Separation of Vehicles
Separation of Vehicles

Author: Cambridge Systematics

Publisher: Transportation Research Board

Published: 2010

Total Pages: 108

ISBN-13: 0309154758

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NCHRP Report 649/NCFRP Report 3: Separation of Vehicles - CMV-Only Lanes presents an extensive compendium of information about CMV-only lanes and examines major issues and concepts that should be understood in developing new applications of CMV-only lane concepts as a potential method for both easing congestion and reducing the number of traffic accidents on highways. Appendices to this report, including an annotated literature review, performance evaluation criteria, benefits monetization factors and unit costs, and net present value calculations for benefit-cost analysis, are available on the TRB website. This report and the supplemental information can be used by public agencies that may be considering CMV-only lane concepts in corridor studies or other planning applications. The report provides data such agencies can use to support their own evaluations of CMV-only lane projects.

Truck Accident Countermeasures on Urban Freeways
Truck Accident Countermeasures on Urban Freeways

Author: Dan R. Middleton

Publisher:

Published: 1994

Total Pages: 110

ISBN-13:

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In addition to fatalities and injuries resulting from truck involved accidents, excessive costs and delays caused by these accidents and incidents have prompted several operating agencies to consider various strategies to reduce the truck accident/incident problem. This study was undertaken to identify truck accident countermeasures implemented in different areas of the U.S. Issues considered when selecting countermeasures for review in this study included urban freeway volumes of 95,000 vehicles per day or higher, a significant number of trucks in the traffic stream (typically 5% or more), and countermeasures involving road design. The study omitted countermeasures directly related to the vehicle and the driver. This project included the following steps: literature search, telephone survey, and field visits to selected sites. The information collected by this project is intended to assist agencies in identifying, selecting, and implementing truck accident countermeasures. Experiences with the following truck accident countermeasures are included in the report: lane restrictions, separate truck facilities, ramp treatments, truck diversions and bans, reduction of shoulder parking, urban truck inspection stations, incident response management, differential speed limit, increased enforcement, tall barriers, and mainlane treatments.