Crash Forensics provides expert analysis of roadway safety and roadway defects. We apply standards of the industry to evaluate roadway sites as to their proper geometric design and maintenance and/or the need for remedial traffic control devices. A brief description of the key topics we address are listed below. Link to our consulting roadway safety expert.
Roadway Sight Distance
Stopping Sight Distance, Intersection Sight Distance, Passing Sight Distance, Railroad Grade Crossing Sight Distance, American Association of State Highway and Transportation Official Standards. Paper/What's Wrong with Applying the New AASHTO Opposing Left-Turn Intersection Sight Distance Standard to Existing Roadways? References.
Slippery Pavements And Hydroplaning
Pavement Skid Resistance, Pavement Texture, Insufficient Pavement Cross Slope, Sag Vertical Curves, Alignment Transitions, Blocked Culverts, Wheel Ruts, Pavement Depressions, Bleeding Asphalt. Paper/Hydroplaning The Trouble with Highway Cross Slope.
Traffic Control Devices
Signs, Signals, and Markings, Manual on Uniform Traffic Control Devices, Traffic Control Device Handbook, Roadway Curve Signing. Paper/Thoughts on a New Approach to Signing Roadway Curves. References.
Accommodating Driver Information Needs
Warning Signs, Signals, Markings, and Road Designs that Provide Information Consistent with Driver Expectancy through Positive Guidance, which Minimize Driver Distractions, Confusion, and Work Load. References.
Construction Zone Operations
Traffic Control Plans, Positive Guidance, Speed Zoning, Barricades, Merging Tapers, Lane Closures, Work Space, Buffer Space, Flagging, Detours, Unencumbered Roadsides, Road Closures, One-Way Traffic Control, Mobile Operations, Advance Warning Arrow Panels, Changable Message Signs, Training. Paper/Application of Traffic Safety Principles in Construction Work Zones — The Dilemma. References.
Pothole Repair, Shoulder Drop-Offs, Wheel Rutting, Snow and Ice Control, Washboard, Dust Control, Asphalt Flushing, Micro Skid Surfacing, Debris on Pavement. References.
Vehicle-Train Conflict Circumstances, Driver Information Needs, Flashing Signals, Automatic Gates, Sight Triangles, Nearby Intersections, Acute Angle Crossings, Steep Crossing Grade, Rough Crossing Surface, Signal Pre-Emption. Paper/Railroad Defense Definition of Extra-Hazardous Grade Crossings / A Rebuttal.
Dr. John C. Glennon Interview with Bill O'Reily on Inside Edition