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This Transportation Research Record contains 28 papers dealing with statistical methods in highway safety research; highway safety data, analysis, and evaluation; occupant protection; and systematic reviews and meta-analysis. The papers address such topics as risk and crash prediction models, crashes on freeways and at signalized intersections, multivehicle crash prediction, speed and safety, red light running crashes, freeway lane closures, ramp design, accident exposure, rumble strip benefits, collisions with median trees, intersection safety, accident reconstruction, safety effects of speed limit changes, geometric design and head-on crashes, deer-vehicle crashes, sport utility vehicle rollover, vehicle occupancy and crash risk, a logit model for studying injury severity, abdominal injuries in rail passengers, healthy transport policies, and meta-analysis.
A research study was performed to develop, field test and evaluate a trial merge warning sign to be used for merging at some signalized intersections. At the present time, the "Lane Ends" sign (W4-2) is commonly used in the United States to alert drivers that a merge ahead is required. One location where this sign is used is after signalized intersections where an additional through-lane ends. To encourage an alternating merge pattern, a trial sign was developed and field tested at two intersections in Connecticut. Merging patterns were monitored via video cameras before and after the sign was installed. An evaluation was completed to determine the effectiveness of this experimental sign.
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Short term, temporary events and activities such as construction or maintenance, infrastructure damage repair, overheight/overwidth vehicle movements, vehicular crashes, hazardous spills, etc. impair facility performance by fully or partially reducing the roadway capacity. Expressed in terms of delay, the impact of these temporary facility use losses has been extensively investigated and well documented. Lacking is a comprehensive examination of how these impacts are valued in monetary terms and how, if at all, these associated costs are recovered by facility owners. The intent of this investigation was to identify any and all costs associated with temporary facility use losses and determine...