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2 Separation of Vehicles--CMV-Only Lanes who may be considering CMV-only lane concepts in corridor studies or other planning applica- tions. The analyses in the project also will provide data that practitioners can use to support their own evaluations of CMV-only lane projects. The research was comprised of the following 10 tasks for meeting the objectives of the project: Task 1--Conduct a literature review of existing CMV-only facilities as well as proposed con- cepts, which will provide information for subsequent tasks. Task 2--Describe planning process issues associated with the development of CMV-only lanes. Task 3--Describe major CMV-only configurations and identify and analyze key design issues. Task 4--Discuss opportunities to apply Intelligent Transportation Systems (ITS)/Commercial Vehicle Operations (CVO) technology to CMV-only lanes and the benefits that can accrue from these deployments. Task 5--Examine opportunities to operate LCVs and heavy-weight trucks on CMV-only lanes. Task 6--Explore issues and opportunities associated with tolling and privatization of CMV- only lanes. Task 7--Prepare an interim report that summarizes the findings and data collected in the first six tasks. The interim report was completed in August 2008 and an edited version of the report that responds to panel comments is presented as Appendix A (available on the TRB website at by searching for NCHRP Report 649/NCFRP Report 3). Task 8--Compile available field and modeling data into a performance evaluation of different CMV-only lane concepts. Task 9--Evaluate CMV-only lanes in terms of relative costs and benefits. Task 10--Prepare a final report that summarizes the results of the analyses conducted in the project. This report includes a summary of existing CMV-only facilities, a description of dif- ferent configurations and the factors that influence the feasibility of each configuration, a dis- cussion of performance data, and a summary of the benefits and costs of different CMV-only lane systems. 1.2 Definition of Commercial Motor Vehicle A commercial motor vehicle (CMV) can be defined in a variety of ways. In response to a request from the project's Technical Panel, a working definition of a CMV was developed for this project. FMCSA, under the Code of Federal Regulations--Title 49 (49 CFR) Part 390 (Rulemaking Procedures--Federal Motor Carrier Safety Regulations), defines commercial motor vehicles for U.S. Department of Transportation vehicle registration purposes as follows: Vehicles having a gross vehicle weight rating or gross combination weight rating (in the case of combination vehicles) of at least 10,001 lbs; or Vehicles designed or used to transport more than eight passengers (including the driver) for compensation; or Vehicles designed or used to transport more than 15 passengers (including the driver), but not for compensation; or Vehicles used in transporting material found by the Secretary of Transportation as being haz- ardous under 49 U.S.C. 5103, and transported in a quantity requiring placarding under 49 CFR, Subtitle B, Chapter 1, Subchapter C. This standard federal definition for CMVs includes not only trucks categorized according to weight and commodity (i.e., hazardous cargo), but also includes passenger vehicles such as buses. Another, more restrictive federal definition is based on commercial driver licensing (CDL) requirements (Part 383: Commercial Driver's License Standards; Requirements, and Penalties).