Establishes requirements for speed control devices installed for traffic calming purposes

HB 1027 sets specific size and marking requirements for traffic-calming devices like speed humps, tables, cushions, and pillows installed on public roads in Missouri after August 28, 2025. It mandates these devices must be exactly 14 feet long, 3.5 inches tall, with a gradual two-foot slope on each side to smooth the transition for vehicles. The bill also requires all such devices to have visible markings to alert drivers. These rules apply directly to local governments and municipalities installing traffic control devices on public roadways.