A discussion of geometric design concepts for weigh-in-motion (WIM) enforcement stations is presented. In-motion weighing techniques for trucks have been developed in recent years by which estimates of static axle weights can be made reliable to within 10 percent for trucks running at speeds of 60 km/h (37 miles/h) and perhaps higher and within about 2 percent for trucks running at speeds of 20 km/h (12 miles/h) or lower. High-speed weighing can be used to screen out only the suspected weight-limit violators and allow the obviously legally loaded trucks to pass without stopping and waiting to be weighed. Suspects can be checked for actual violation by a low-speed WIM system at rates up to 10 trucks/min without stopping or by static scales at perhaps 20 trucks/h with stopping required. A number of WIM enforcement-station layouts are possible. Two configurations are suggested. A recommended system of signs, pavement markings, and traffic-control signals that will guide the driver smoothly through the WIM enforcement station at reduced speed, but without stopping, is presented. It is concluded that weight-enforcement operations can be accomplished safely, efficiently, conveniently, and economically with properly designed WIM equipment, weigh stations, and traffic-control systems.(Author)