Madden Accident Analysis, Investigation, Reconstruction Traffic Accident (Crash) Investigation and Reconstruction
  • single vehicle accidents, including going off the roadway and striking fixed items, such as utility poles

  • two vehicle collisions, at various angles, such as:
Phone: (440) 838-1191
  • accidents involving:
  • automobiles • pick-up trucks • vans • sport utility vehicles (SUVs)  • cars • pickup trucks  
  • specialized smaller vehicles, such as ambulances and ambulettes
  • motorcycles • off-road motorbikes • motorcyclists
  • bicycles • bicyclists
  • pedestrians • motorists • vehicle passengers
  • school buses • city buses 
  • railroad trains
  • agricultural equipment, including farm tractors and trailers
Senior Forensic Engineer James D. Madden, P.E. Earned Certificates of Successful Completion in 7 courses, over 8 weeks, in the Traffic Accident Investigation and Reconstruction program at Northwestern University Traffic Institute, including:
  • Technical Accident Investigation (2 weeks)
  • Vehicle Dynamics (1 week)
  • Traffic Accident Reconstruction (2 weeks)
  • Continued Case Studies in Traffic Accident Reconstruction (1 week)
  • Computer-Assisted Traffic Accident Reconstruction (1 week)
  • Motorcycle Accident Reconstruction (2 days)
  • Vehicle Lamp Examination, covering interpretation of collision damage to lamps (3 days)
Consultation is available before starting a case. We invite you to
consult with us. There is no charge for an initial phone consultation.
Call us, or if you prefer we can schedule the consultation in advance.
Consultation with James D. Madden, PE, a Professional Engineer, and Forensic
Engineering Consulting and Testifying Expert Witness, is available to the client at all
times during the work - before, during, and after the investigation,
engineering analysis, reconstruction, report, and any other work on the case.
Phone: (440) 838-1191
Download a Summary or Detailed Curriculum Vitae (CV) / Resume' for James D. Madden, P.E., email us at [email protected]
  Qualifications of James D. Madden, P.E., Senior Forensic Engineer
  Downloads and Links -  Curriculum Vitae, Email
For mailing addressphonefax and email address click a button below the Fee Schedule section.
  Contact information
  Fee Schedule
Phone: (440) 838-1191
Over the last 30 years we have regularly worked on accidents which occurred in Ohio, Pennsylvania, Michigan, New York and nearby, including inspections of accident sites, equipment, and facilities, with reports and testimony. During these 30 years we have also worked on accidents which occurred in other states, and equipment and facilities located in other states, with inspections of accident sites, equipment, and facilities, from Kansas and Utah to Vermont and North Carolina, with reports and testimony for these accidents, when applicable.
  Geographic Area of Work - North America
Contact us to discuss your case by phone at NO CHARGE
This consultation can be scheduled in advance to meet your schedule.
Contact us by phone, fax, mail or email for a copy of the Fee Schedule for charges for engineering
and consulting services and testimony.  Click a button below for contact information.
attended seminars on traffic accident investigation and reconstruction presented by the Society of Automotive Engineers (SAE) 
prepared by state and federal authorities and take into consideration the more restricted role that Safeguards can take in use with highways and roadways compared to, for example, stationary machinery. These codes and standards include the Manual of Uniform Traffic Control Devices issued by the various states and the federal government. 
These codes and standards, and associated manuals, also take into consideration the significant role that drivers, other users of the roadways and persons who encounter roadways, play in the traffic system. These also take into consideration the long history of the use of written signage, auditory warnings (for example, bells at railroad crossings), symbols on signage and roadway surfaces, and visual control devices (for example, traffic control lights), and the expectations that this long history brings from the public. 
Of particular concern is the fact that for this traffic system, to be fully effective, it must be learned by all drivers, in most cases at a relatively early age, and changes cannot be easily communicated to all drivers over the subsequent decades, once they have learned the system.
For more information on Safeguards and Warnings  click on >>>
took 10 coursesas listed below, at the Northwestern University Traffic Institute and Center for Public Safetyspecifically designed to teach investigation and reconstruction of traffic accidents, based on engineering mechanics, physics and mathematics, using the tools of accident investigation and scientific accident reconstruction, and to train in the acquisition and analysis of data from vehicle CDR systems
  verbal reports, by telephone or in face-to-face conferences
We present the results of our investigations, preliminary evaluations, engineering analyses, reconstructions, etc. in the client's choice of any, or all, of the following: 
  Presentation of results of our work
Our work investigating, analyzing and reconstructing accidents, and presenting the results, may include any 
or all of the following, depending on the needs of the case: 
  Our Typical Work Activities and Products, when warranted by the case
  written reports and affidavits
  deposition testimony, including video deposition
  trial testimony and arbitration testimony
James D. Madden, P.E., while performing Forensic Engineering, including Accident Reconstruction, work full-time for more  than 30 years, for both plaintiff and defendant, has*:
  Forensic Engineering Work by Senior Forensic Engineer James D. Madden, P.E. 
  completed over 1100 cases
  written and issued over 700 reports
  testified in over 100 depositions
  written and issued over 70 affidavits
  testified in over 90 trials
took 16 college courses in mathematics, physics and engineering mechanics, the scientific bases for traffic accident reconstruction
  attended engineering seminars presented by the National Academy of Forensic Engineers
regularly attend additional technical courses and seminars each year to meet the requirements for continuing engineering education for the Professional Engineer's license
  over 45 years of engineering experience, with: 
  17 years experience in industrial operations, engineering design and construction assistance 
  over 30 years experience in forensic engineering, including:  
  working on over 1100 cases
  issuing over 700 reports and over 70 affidavits
  testifying in over 100 depositions and over 90 trials
  Experience and Qualifications of James D. Madden, P.E. in regard to Traffic Crashes 
     and Accidents, including roadway design, maintenance and safety issues such as 
     signage, signals, striping (lines on the roadway) and geometric configuration
  • large non-articulated trucks, including those with:
  • trucks with semi-trailers (tractor-trailers, "18 wheelers") 
  • trucks with independently supported trailers ("full trailers")
  • garbage trucks 
  • dump trucks
  • tank trucks
  • tandem (two) rear axles
  • triaxle (three) rear axles
including non-articulated trucks such as:
including truck-tractors, with trailers such as:
  • box trailers
  • stake and flatbed trailers
  • tanker trailers
  • head-on
  • rear-end
  • sideswipe
  • intersection ("t-bone")
  • at other impact angles between the vehicles
Roadway design, construction and maintenance is regulated by legislation and codes and standards. These codes and standards are prepared and issued by state and federal authorities. They include Standards for highway design, construction and maintenance issued by the various states and the federal government. They are include Recommended Practices, Guidelines and Policies issued by the Association of State Highway and Transportation Officials (AASHTO), including the Roadside Design Guide and the Policy on the Geometric Design of Highways and Streets.
Roadway design, construction and maintenance codes and standards serve different purposes, one of which is to provide roads which are safer than would the case without such standards. Non-conformance with highway design, construction and maintenance standards which are intended to promote a safer roadway can be expected to lead to less safe highways and streets than would otherwise be the case. 
For more information on Codes and Standards click on >>>
  • articulated truck assemblies, including:
  click on underlined words to use links - if no word is underlined try hovering the mouse over words to see any underlines
  Examples of Types of Traffic Accidents Analyzed          
                                                         ● see examples of vehicles and persons involved in analyzed accidents in next section below         
  Examples of Vehicles and Persons Involved in Analyzed Traffic Accidents  
                                                         see examples of types of traffic accidents analyzed in previous section above
  Coursework at Northwestern University Traffic Institute and Center for Public Safety 
  Traffic Signs, Signals, Markings and Warnings
     also see highway, street and roadside codes, standards, guidelines etc. in the previous section above
  Highway, Street and Roadside Codes, Standards, Guidelines and Recommended Practices
                                                       also see traffic signs, signals, markings and warnings in the next section below
over 485 traffic accidents have been investigated, analyzed and reconstructed as part of the forensic engineering work during over the last 30 years, including engineering analysis of highway design and safety issues, such as geometric configuration, road condition, drainage, signage, striping and conformance to the Manual of Uniform Traffic Control Devices and design standards 
earned 2 Engineering degrees, Bachelor of Science and Master of Engineering, and took additional post-degree coursework, with coursework in physics, chemistry, mathematics, engineering mechanics, mechanical engineering, chemical engineering and normal psychology
at the start of forensic work, completed refresher and additional post-degree college credit coursework and continuing education coursework in mechanical engineering, metallurgy and materials
earned the Professional Engineers license (P.E.) by taking the National Council of Engineering Examiners' (NCEE) examination in Fundamentals of Engineering and the Mechanical Engineering 
and Chemical Engineering sections of the NCEE examination in Principles and Practices of Engineering
designated a Diplomate Forensic Engineer by the National Academy of Forensic Engineers in accordance with the standards of the Council of Engineering and Scientific Specialty Boards (CESB)
earned Certification as a Crash Data Retrieval (CDR) Technician Level 1 and 2 and Crash Data Retrieval (CDR) Data Analyst at the Northwestern University Center for Public Safety, in accordance with the standards of the Collision Safety Institute (CSI), for the Bosch CDR system (Click here for more details regarding the CDR system and Certification in the 'Coursework' section below).
see the section above for  (c) examples of types of traffic accidents analyzed 
Our work also includes engineering analysis of the effects on the accident of driver actions, driver condition, vehicle condition, and weather, ambient light and lighting conditions. Engineering analysis of the roadway design and condition and traffic control devices, and determination of the effect of these factors on the accident is also included in our work. Our work also includes assessment of adherence to applicable codes, standards and recommended practices, including applicable highway and roadway design standards. Our analysis includes assessment of adherence to the applicable Manual of Uniform Traffic Control Devices, which controls the use of traffic control devices on streets, roads and highways.
Traffic control devices include traffic control signals (red-yellow-green, flashing yellow, etc.) roadway signs, painted lines on the pavement (called "striping"), curbing, abutments, etc., used to control traffic patterns. The applicable Manual of Uniform Traffic Control Devices (MUTCD) covers the requirements for these devices and the acceptable application of these devices. This subject is covered in more detail below in  'Highway, Street and Roadside Codes, Standards...'. Click on the underlined words in this website to link to the sections named.
Our investigation of Traffic Accidents includes, when appropriate, inspection of the accident site and the accident vehicles and many other items as listed under 'Our Engineering Analysis' below. Also see 'Typical Work' below for other activities typically involved in our work.
Our work with Traffic Accidents and Crashes is an engineering activity based on accepted engineering standards and practices and the science of Engineering Mechanics, the science of movement and forces. Engineering Mechanics is the practical engineering science derived from the theoretical science, physics, and is the basis for the calculation techniques and equations used in traffic accident reconstruction. Formal education in Engineering and Engineering Mechanics has been augmented with a broad range of courses in Traffic Accident Investigation and Reconstruction taken at the Northwestern University Traffic Institute and Center for Public Safety. These courses are listed below in  'Coursework at Northwestern University...'
Our work with Traffic Accidents and Crashes includes appropriate involvement of Human Factors as this relates to the capabilities and actions of the vehicle drivers and other participants. See 'Experience and Qualifications...' below for this experience and the other qualifications for work with Traffic Accidents. Also see 'Human Factors' on another page for more information regarding Human Factors work with the forensic work. 
Our work with Traffic Accidents and Crashes - includes investigation and reconstruction of the accident to determine how the accident occurred, and how the factors associated with the accident, including pre-crash events, were related to the causation of the accident. 
The use of Warnings on highways and roadways - in the whole traffic system - is regulated by     legislation and codes and standards for traffic applications. These codes and standards are 
We have investigated and reconstructed a very broad range of accident types involving a very broad range of accident vehicles and other participants, including pedestrians of a wide range of ages and bicyclists and motorcyclists. The details of the accident types and vehicles and persons are included in 'Examples of Types of Traffic Accidents Analyzed' and 'Examples of Vehicles and Persons Involved' below.
  • collisions involving: 
  • out-of-control slides and yaws
  • rollovers and/or launches, including off embankments
  • off-road travel, intended or unintended, and abrupt change in travel surfaces
  • adverse roadway conditions and road-edge dropoffs
  • multiple collisions between the same vehicles
  • more than two vehicles with chain collisions
  • motor vehicles of the same type, such as 2 or more automobiles, or 2 or more trucks
  • motor vehicles of different types, such as collisions between automobiles, trucks and/or buses 
  • motor vehicles and pedestrians or bicycles
  • motorcycles and other motor vehicles
  • motor vehicles or bicycles and railroad trains at railroad grade crossings
^^^ click on buttons to go to other pages covering these subjects  ^^^
  • CDR Technician Certification Courses 1 & 2 - classroom (CDR Tech 1) and hands-on (CDR Tech 2) training in the techniques for retrieval of crash data and other recorded data from Event Data Recorders (EDRs) through the vehicle Data Link Connector (DLC) and directly from the EDRs associated with the vehicle control modules (1 day for each of the 2 courses)
Crash Data Retrieval (CDR), also known as Event Data Retrieval (EDR), is the term for the retrieval of crash data, pre-crash data, and other recorded data from passenger cars, SUVs and light trucks using a specific software and hardware system designed for this purpose. This data is retrieved either directly from the Event Data Retrieval modules or through the Diagnostic Link Connector (DLC), using equipment specifically designed for this purpose. The specific components of vehicles associated with Crash Data Retrieval, and the names and acronyms assigned to these components, can vary by vehicle manufacturer. 
Traffic Crashes, Accidents - Table of Contents - links to content on this page
Engineering Analysis may include analysis of the following:
Human Factors Considerations
Accident Reconstruction
Accident Investigation
Driver & Pedestrian Actions
Roadway Design & Conditions
Traffic Control Devices
Home Page - Traffic Accidents
See details of the pre-forensic work on the Employment Page and the Engineering Design Page.
See details of the forensic work throughout this website, and a summary on the Employment Page.
See more about qualifications of  James D. Madden, P.E. on the Qualifications Page.
For more on qualifications click on >>> 
The qualifications of James D. Madden, P.E., Senior Forensic Engineer, Consulting and Testifying Forensic Engineer and Accident Reconstruction Engineer, are listed above on this page and in additional detail on the Qualifications Page.  <<< Click on the underlined text
Use the Search Box at the left to search the whole website.  
Use Control F, 'Ctrl' + 'F', to locate specific words on this page.
  Types of Traffic Accidents (  photos)
  Vehicles and Persons (  photos)
  Engineering Analysis (  photos)
  Contact Us by Phone, Mail or Email      
  Consult, before and after assignment
  Fee Schedule availability
  Geographic Area available for Work
  Links to Other Pages (left sidebars)
      click on the underlined squares to link to the subjects
  Our Work with Traffic Accidents, including those involving vehicles, pedestrians, bicyclists, etc.
  Our Forensic Engineering Work - number of ● Cases  ● Reports  ● Affidavits  ● Testimonies  
  Our Typical Work Activities & Products
  Presentation of Results of Work
  additional Qualifications
  Curriculum Vitae, CV, Resume'
  Traffic Accident Work Activities
  Traffic Accident Issues Addressed
  Traffic Accident Experience
  Traffic Accident Courses
  Roadway Standards
  Traffic Signs & Signals (  photos)
  inspection of the accident site, such as a roadway, outdoor facilities, building or industrial facilities
inspection of the involved equipment, in current condition, including in damaged condition (such as crashed vehicles); and when available for operation, during operation (such as industrial equipment)
  interviewing witnesses (often during the inspection of the accident site, product and/or equipment)
coordinating or interfacing with others while they are preparing specialized exhibits such as video animations and videos of demonstrations
review and study of case documents, evidence and applicable codes, standards, regulations and recommended practices
  written reports and affidavits, and exhibits
drawings, calculations, graphical analyses, computer analyses, etc. as required to analyze and reconstruct the accident, and to present the engineering analysis and reconstruction
  testing accident items and exemplar items (such as consumer products)
  photography and/or video of the accident site and involved equipment
  testimony in deposition, trial and arbitration
CDR data analysis
  • CDR Data Analyst Certification Course - training in the analysis of crash data, pre-crash and other recorded data from Event Data Recorders associated with vehicle control modules, considering the differences in recording and reporting by different manufacturers, for different models and model years (1 week)   
The CDR/EDR System is a specialized data collection and data readout system. The data in the CDR/EDR Report does not necessarily have the meaning that an untrained  person reading the CDR/EDR Report might think. For this reason the CDR Data Analyst Certification program was established to train persons in the correct interpretation of the data so that persons who will be interpreting the CDR/EDR data can interpret it correctly.
  Analysis of Accident Data in Crash Data Retrieval (CDR) Reports [also called "black box" data reports]
Work will involve the following, in part:
General Discussion of our usual work on Traffic Accidents
Experience & Qualifications with Traffic Accidents
Vehicles & Persons Involved
Specific Education in Traffic Accident Investigation & Reconstruction
Other Information which is listed in the page Table of Contents below
Types of Traffic Accidents Handled
This page also includes the following: 
* data from the so-called vehicle "black boxes"
Links on pages of This Website include:

This website was designed in Google Chrome, with adjustments for Firefox, Edge and Internet Explorer. This website will function in Chrome and Chrome-based browsers, including Opera and Torch. This website will also function in Firefox, Edge and Internet Explorer, with some minor layout and text issues possible. This website may not function in Safari. 

If lines of text overlap in this website, check the browser zoom setting, reducing the zoom should prevent overlap of lines of text.
Left SideBars at the top left of the pages - click on the subjects - these subjects are preceded by squares (■)
Page Title lines - click on the Title lines to link to the Table of Contents for the page, or other appropriate page location
squares (■) with words to the right click on the words
underlined squares (  ) with words to the right click on the underlined squares
underlined words (example) - click on the underlined words or just the underline - note that the POINTING FINGER will indicate when the cursor is in position to click for the link
words with a colored background (excluding section headings) - click on the words
bullets (●) with words to the right (excluding lists in paragraphs) - click on the words  
Links are indicated by underlines, squares (■), colored backgrounds, and sometimes by the position on the page, as described in the list below. When a link is ready to be clicked, to jump to a new location on the page, or elsewhere in the website, or to another website, this will be indicated in the common browsers by the cursor becoming a hand with the index finger pointing to the link. When the hand with the index finger is not showing there is no link to click on.

If lines of text overlap in this website check the browser zoom setting - reducing the zoom should prevent overlap of lines of text. 
If parts of the website are missing or distorted, such as a section of the Left Navigation Bar, or a button, try rebooting the page in the browser, one or more times - click on the circle arrow at the left of the website name [URL].
Phone: (440) 838-1191
Phone: (440) 838-1191
brown buttons below open pdfs in separate tabs for downloading 
or printing
If lines of text overlap in this website check the browser zoom setting - reducing the zoom should prevent overlap of lines of text. 
If parts of the website are missing or distorted, such as a section of the Left Navigation Bar, or a button, try rebooting the page in the browser, one or more times - click on the circle arrow at the left of the website name [URL].
over 30 Years Investigating, Analyzing, Reconstructing & Testifying about Accidents
Contact us at ▪ 440-838-0640 or ▪ 440-832-9540 or ▪ [email protected]
Forensic Engineering & Scientific Accident Reconstruction
Free Initial Phone Consultation - Fixed Fee Preliminary Accident Evaluation available
working in Ohio, Pennsylvania, Michigan and elsewhere in the USA, from Cleveland and Akron, Ohio

  • Crash Data Retrieval (CDR)* Certification Courses, for CDR Technician I and II Certifications, and CDR Data Analyst Certification, covering retrieval of crash data, pre-crash data, and other data from the Event Data Recorders (EDRs) in passenger cars, SUVs, and light trucks such as pickup trucks and vans, and the analysis of this data, in the following 3 courses:
Senior Forensic Engineer James D. Madden, P.E. Earned Certificates of Successful Completion in 3 courses, over approximately 1-1/2 weeks, and the 3 associated Certifications, in the Traffic Accident Investigation 
program at Northwestern University Center for Public Safety, including:
For continuation of the discussion, above, of our work, with more details and links to more specific information about the various subjects, go to the section titled: "Our Work with Traf-fic Accidents and Crashes(click on the underlined words at the left to go to "Our Work with Traffic Accidents and Crashes"). Additional information on the subjects discussed above is also pro-vided in the subjects immediately below (click on the underlined words) and also on this page's "Table of Contents" (click on the underlined words) .  
See the Left SideBar (click on the underlined word) for links to additional related subjects with more details, some on this page, others on other pages. Also note the presence of links throughout the pages of this website to areas on the same pages like the "top of page" (and other areas on the same page), for ease in navigating through the pages. 
Generally on this website, click on the underlined words to go to the underlined listings.
Click on the items below, following the squares, to go to the listed subjects
Other Information which is listed in the page Table of Contents below
Madden Accident Analysis & Forensic Engineering, during a more than 30 year practice in Scientific Traffic Accident Reconstruction, has investigated, analyzed and reconstructed Traffic Accidents in Ohio, Pennsylvania, Michigan and a num-ber of other states between Kansas and Connecticut. We are available for Traffic Accident Investigation and Reconstruction work throughout the United States.
Investigations and inspections are a part of our Accident Analyses and Recon-structions. This includes inspections of accident sites, including roadways and road and off-road surfaces, and debris and roadway damage, from hands-on site inspection, and also from study of photographic and video documentation of the accident scene. The site inspections augment (and are integrated with) the evid-ence documented at the accident scene, including the locations of the vehicles at the scene. Also included are vehicle inspections, from hands-on inspection to study of photographic and video documentation of the vehicles at the scene and at other times earlier than our hands-on inspection. Scientific Traffic Accident Reconstruction has been performed, as appropriate, in the vicinity of the acci-dents, and also at our offices in the Akron and Cleveland, Ohio areas. 
Our Accident Reconstruction work has included covering issues with roadway construction (completed or in progress) and roadway condition and mainte-nance. Our work has included consideration of weather, light conditions (daylight, twilight or nighttime), artificial lighting conditions, human factors and the actions of persons in accidents, the condition of vehicles, and the presence of traffic control, and what this control required and provided, and whether (and how) it aided drivers in driving safely. Our work has included assessment of the adherence to applicable codes, standards and recommended practices, includ-ing applicable highway and roadway design standards, and vehicle safety stan-dards, etc. We have performed work for both plaintiffs and defendants, in civil and criminal litigation, and other dispute resolution. We are currently available for cases. 
Our Engineering Analysis of Traffic Accidents/Traffic Crashes include, as appropriate, accident investigation, engineering analysis and reconstruction of the traffic accident, either manually or by computer, as required to address the issues. Our engineering analysis of traffic accidents includes analysis of roadway issues and analysis of the effects of pedestrian actions and effects of driver actions and inactions.
  Our Engineering Analysis of Traffic Accidents 
                           ▪ including Accident Investigation and Reconstruction
<< click for a description of the typical work performed
<< click for examples of Types of traffic accidents analyzed
<< click for examples of Vehicles and Persons involved in traffic accidents analyzed
<< click for discussion regarding Highway Standards, Codes, and related material
<< click for discussion regarding Signs, Signals, Markings and Warnings
  • speeds of vehicles at various points before and during an accident
  • locations of vehicles, pedestrians, bicycles, etc., before and at various times during an accident
  • sight distance, nighttime visibility and weather-impeded visibility
  • appropriateness of roadway design and traffic control devices (such as lane lines, warning and other signs, and traffic control and pedestrian control signals), and their relation to an accident 
  • the relation of the condition of roadway facilities to an accident, including drainage issues related to water and/or ice on the roadway
  • answers to questions, such as: 
  • Were all vehicles moving at collision?  If not, which ones were moving and stopped?
  • Did vehicles stop at stop signs or red lights before collision?
  • Which vehicle was left of center first, and also at collision?
  • Which vehicle occupant was driving when the accident occurred?
  • Were the headlights and/or other vehicle lights on at collision?
  • What was the accident causation? 
  • Did the roadway configuration, construction or condition cause or contribute to the accident?
  • What was the relation of the accident factors to the accident causation?
  • Could the accident have been avoided by any participant in the accident?
As part of the Engineering Analyses of Traffic Accidents and Crashes we address the following issues, and others, when appropriate:
  • accident site inspection, measurement and photography
  • inspection, measurement and photography of damaged vehicles and vehicle components 
  • inspection of vehicle lamps (headlights, taillights, etc.) and lamp filaments, when appropriate
  • sight distance and nighttime visibility studies
  • skid testing of vehicles and determination of "drag" factors
  • accident sight photogrammetry • graphical photogrammetry from photographs
  • study and consideration of accident evidence and data available from other sources, including police accident investigations, Crash Data Retrieval from the vehicles, and statements and testimony of witnesses
  • evaluation of roadway surface condition, skidmarks, yawmarks, scuff marks, other tiremarks, gouges, other roadway and off-roadway surface damage, and debris
  • evaluation of vehicle and vehicle component damage, including evaluation of vehicle lamp and lamp filament condition to determine if lamps were on at collision
  • evaluation of mechanical injuries to pedestrians and vehicle occupants
  • evaluation of roadway design and pre-accident condition (for safety) and traffic control devices, such as lane lines, warning and other signs, traffic control lights and other signals (for suitability)
  • preparation of scale site drawings, and use in accident analysis
  • determination of the pre-collision movements of vehicles and pedestrians in relation to time, distance and each other (time-distance studies)
  • engineering analysis of the movements (dynamics) of vehicles, pedestrians, and vehicle occupants during an accident, relative to each other, and relative to fixed items in the accident area, such as utility poles
  • determination of acceleration and maneuverability capabilities of vehicles, particularly related to possible accident activities
  • complete traffic accident reconstruction, both manually and by computer, to address the required issues
As part of the Engineering Analyses of Traffic Accidents and Crashes we perform the following activities, and others, when appropriate:
<< click for a description of the typical activities performed
<< click for a description of the typical issues addressed
We have investigated and reconstructed a broad range of accident types, e.g. single-vehicle, multi-vehicle, including two-vehicle, with such collision types as those commonly described as head-on, side-swipe, rear-end, T-bone (perpendi-cular) etc. , and combinations of these collision types, involving a broad range of on-road and off-road vehicles, including automobiles, SUVs, vans, light and heavy trucks, buses, tractor-trailers, motorcycles, ATVs, snowmobiles, bicycles, etc. Collisions investigated, analyzed and reconstructed, in addition to those described above, have included collisions of motor vehicles with pedestrians, and collisions of railroad trains with bicycles and motor vehicles.
In regard to the results of our work, we provide consultation, expert reports, affi-davits and testimony. Testimony has been provided in depositions, arbitrations, hearings, and in trials, including in Federal court, and in State courts in Ohio and a number of other states from Kansas to Pennsylvania. ​
Links to Specialty Pages
Page Links 
Links to General Pages

about Sr Forensic Engineer

Main General Pages

Basic Forensic Specialties
Main Forensic Specialties
click on items below 
click on items below 
Link to Traffic Accident,  Crash Website 
click on item below
Website opens in a browser tab next to the tab for this page
Madden Accident Analysis, Investigation, Reconstruction
Copyright 2011, 2012, 2015, 2016, 2018, 2019, 2020, 2022 by Madden Accident Analysis, Investigation, Reconstruction, and by James D. Madden, P.E. All rights reserved.
This website contains photographs which are licensed with restrictions that prohibit downloading, reproduction, re-publication or re-transmission.
Madden Accident Analysis, Investigation, Reconstruction, through its Senior Forensic Engineer, James D. Madden, P.E., a licensed Professional Engineer, and Board Certified Diplomate Forensic Engineer, has performed Accident Investigations, Engineering Analyses and Accident Reconstructions routinely for accidents / incidents and cases located in Ohio, Pennsylvania, Michigan, and New York, in the technical areas which are noted in this website, as well as providing expert reports and testifying in court proceedings in these states in the capacity of an Expert Witness, including depositions, arbitrations and/or trials. Forensic Engineering work has also performed in, and/or for cases in, West Virginia, Kentucky, Indiana, Illinois, Maryland, North Carolina, Vermont, Kansas and Utah, with testimony in deposition and court in West Virginia and Kansas.
Madden Accident Analysis, Investigation, Reconstruction, through its Senior Forensic Engineer, James D. Madden, P.E., a licensed Professional Engineer, and Board Certified Diplomate Forensic Engineer, has performed Accident Investigations, Engineering Analyses and Accident Reconstructions for accidents / incidents and cases in the metropolitan areas of Cleveland, Akron, Canton, Toledo, Warren, Youngstown, Mansfield, Columbus, Dayton, Cincinnati, Lima, Findlay, Marietta and Steubenville, Ohio, as well elsewhere throughout Ohio, and the metropolitan areas of Pittsburgh and Erie, Pennsylvania, as well as elsewhere throughout western and central Pennsylvania, and the metropolitan areas of Detroit, Ann Arbor, Lansing, Flint and Port Huron, Michigan, as well as elsewhere in southern Michigan, and the metropolitan areas of Buffalo and Syracuse, New York, as well as elsewhere in western and central New York state. In many of these areas James D. Madden, P.E. has provided expert reports and testified in the capacity of an Expert Witness in court proceedings, including depositions, arbitrations and/or trials.  
Latest updates to the overall document and activity counts (reports, affidavits, cases, trials, and depositions), and counts of the number of individual specialty cases reported in this website were completed 7/15/2020. The updates of the overall document and activity counts and the counts of the number of individual specialty cases for the period between 12/2007 and 7/15/2020 were based only on the documents produced, and thus are under-counts (i.e. cases without a report or affidavit were not included in the counts).
Madden Accident Analysis, Investigation, Reconstruction
1700 West Market Street, Suite 318, Akron, Ohio 44313
or contact us for our Cleveland Ohio address
phone: 440-838-0640 or 440-832-9540, fax: 440-838-1192
email address: [email protected]

Madden Accident Analysis, Investigation, Reconstruction, through its Senior Forensic Engineer James D. Madden, P.E., is available for Accident Investigations, Engineering Analyses, Accident Reconstructions, and testimony in depositions, hearings, arbitrations, and trials, for cases located throughout North America.