California bills would require speed-limiting tech in vehicles and side guards on tracks

California could limit how fast vehicles sold in the state can go by requiring the installation of speed governors if a bill authored by state Sen. Scott Wiener, D-San Francisco, becomes law. 

Wiener introduced a pair of bills Wednesday that would spur roadway improvements and require automakers to install intelligent speed assistance, or ISA technology, that limits a vehicle to going no more than 10 mph over the posted speed limit. The technology can adjust to different speed limits on different roads.