TRB Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 23: Operator Drug and Alcohol Testing Across Modes explores practices used to deter drug and alcohol use among operators within the U.S. Department of Transportation (DOT) regulated community. The report includes a brief history of the transportation workplace drug and alcohol testing program, the general approach, the reasons for testing, some of the issues that impact the validity of the tests, and an outline of the specific regulations by mode. Some alcohol and drug testing statistics are presented in the report to help provide a sense of the scope of the program and of the prevalence of illegal alcohol and drug use among safety sensitive employees. The report also highlights alternative strategies aimed at helping to deter illegal alcohol and drug use among employees.

TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 20: Potential Safety Benefits of Motor Carrier Operational Efficiencies addresses risk avoidance strategies and highlights their use and perceived safety effects. The report is designed to assist motor carriers in deploying their vehicles in ways that may minimize crash risk.

TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 22: Safety Management in Small Motor Carriers explores small motor carriers' strengths and weaknesses in safety management, and identifies potentially effective safety practices.

TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 13: Effectiveness of Commercial Motor Vehicle Driver Training Curricula and Delivery Methods explores the state of commercial motor vehicle (CMV) operator training in the trucking and motorcoach industries. The report examines the experiences of training programs that are using some combination of simulators and computer-based instruction and identifies measures of training effectiveness being used in the CMV community.

TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 14: The Role of Safety Culture in Preventing Commercial Motor Vehicle Crashes explores practices on developing and enhancing a culture of safety among commercial motor vehicle drivers. The report also examines suggested steps for increasing a safety culture through a series of best practices.

"TRB's Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Synthesis 21: Driver Selection Tests and Measurement synthesizes information on the use of tests, measurements, and other assessment methods used by commercial truck and bus companies in the driver selection process. The report also identifies and describes driver selection methods and instruments and their potential usefulness in predicting driver crash risk."--Publisher's description.