The U.S. Array Cold Regions Research and Engineering Laboratory has recently acquired an instrumented vehicle for the measurement of forces at the tire/surface material interface. The CRREL instrumented vehicle (CIV) is equipped with moment-compensated triaxial load cells mounted in the front wheel assemblies. Forces are measured in the vertical, longitudinal (in the direction of motion) and side directions. In addition, accurate wheel and vehicle speeds and rear axle torque and speed are measured.Modifications to the vehicle to facilitate the performance of traction and motion resistance tests include four lock-out type hubs to allow front-, rear- or four-wheel drive and a dual brake system for front-, rear- or four-wheel braking. A minicomputer-based data acquisition system is installed in the vehicle to control data collection and for data processing, analysis, and display.Discussion of the vehicle includes its operation and use for the evaluation of the tire performance and surface material properties of motion resistance and traction.