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documentation on compliance with Mexico's bridge Department of Transportation, www.fmcsa.dot.gov/ construction standards, monitoring of bridge con- registration-licensing/cdl/cdl.htm, accessed August struction, or bridge maintenance. Nonetheless, inter- 20, 2010. national research shows that U.S. axle weights and 3. "Is professional CDL driver training or drivers corresponding GVWs are significantly lower than education required to obtain a commercial license?" those of other countries. DMV Answers, dmvanswers.com/questions/1949/ Is-professional-CDL-driver-training-or-drivers- On the subject of designating specific routes for education-required-to-obtain-a-commercial-license, heavier vehicles as is done in Mexico, the United accessed August 20, 2010. States has begun the process in a limited way with 4. Daniels, D. Longer Combination Vehicle (LCV) Regu- LCVs. If the United States should decide to lift the lations Training. Thomson Delmar Learning, Clifton moratorium on LCV route mileage, there would be Park, NY, 2006. increased administrative costs in terms of permitting, 5. Woodrooffe, J., Glaeser, K. P., Nordengen, P., monitoring, and enforcement. These costs could be Bereni, M., Germanchev, A., Eady, P., and Jacob, B. offset by permitting and other fees. "Safety, Productivity, Infrastructure Wear, Fuel Use and Emissions Assessment of the International Truck Fleet--A Comparative Analysis," OECD International REFERENCES Transport Forum, Paris, 2010. 1. North American Transborder Freight Data (database). 6. Special Report 227: New Trucks for Greater Pro- Bureau of Transportation Statistics, Research and ductivity and Less Road Wear, An Evaluation of Innovative Technology Administration, U.S. Depart- the Turner Proposal. Transportation Research Board, ment of Transportation. http://www.bts.gov/programs/ National Research Council, Washington, D.C., 1990. international/transborder/. Accessed 8/22/2010. 7. Comprehensive Truck Size and Weight Study-- 2. Commercial Driver's License Program (CDL/ Volume I: Summary Report. U.S. Department of CDLIS). Federal Motor Carrier Administration, U.S Transportation, Washington, D.C., 2000. 32

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Transportation Research Board 500 Fifth Street, NW Washington, DC 20001 ISBN 978-0-309-21358-5 90000 Subscriber Categories: Highways Freight Transportation Law Policy Vehicles and Equipment 9 780309 213585 These digests are issued in order to increase awareness of research results emanating from projects in the Cooperative Research Programs (CRP). Persons wanting to pursue the project subject matter in greater depth should contact the CRP Staff, Transportation Research Board of the National Academies, 500 Fifth Street, NW, Washington, DC 20001. COPYRIGHT INFORMATION Authors herein are responsible for the authenticity of their materials and for obtaining written permissions from publishers or persons who own the copyright to any previously published or copyrighted material used herein. Cooperative Research Programs (CRP) grants permission to reproduce material in this publication for classroom and not-for-profit purposes. Permission is given with the understanding that none of the material will be used to imply TRB, AASHTO, FAA, FHWA, FMCSA, FTA, or Transit Development Corporation endorsement of a particular product, method, or practice. It is expected that those reproducing the material in this document for educational and not-for-profit uses will give appropriate acknowledgment of the source of any reprinted or reproduced material. For other uses of the material, request permission from CRP.