First concrete median barriers used in California in mid-1940s. Jersey barrier developed at Stevens Institute of Technology in 1950s. Named after New Jersey, where it first appeared in 1959. Typical barrier stands 32 inches tall, made of steel-reinforced concrete
First automated traffic signal system developed in Toronto in 1954. Phases indicate green signal periods for traffic movements. Movements are permitted paths through junctions. Stages are groups of non-conflicting phases moving simultaneously
Oldest chassis with two long beams supported by two short beams. Easy to manufacture and assemble but heavy and weak for cornering. Used in vehicles needing heavy towing
Motorcyclists are 28 times more likely to die and 4 times more likely to be injured. 5,932 motorcycle fatalities occurred in 2021, highest since 1975. 83,000 motorcycle riders were injured in 2021. 36% of fatal accidents involve unlicensed drivers
Ford Sync 3 controls all car devices from one place. Latest version is SYNC3 v3. U.S. 20204. Update is free and mandatory for Ford cars
Comprehensive campaigns target all road users for safety education. Schools should integrate road safety into curricula