New cars in California could alert drivers for breaking the speed limit

California could eventually join the European Union in requiring all new cars to alert drivers when they break the speed limit.

California could eventually join the European Union in requiring all new cars to alert drivers when they break the speed limit, a proposal aimed at reducing traffic deaths that would likely impact motorists across the country should it become law.

The U.S. federal government sets safety standards for vehicles nationwide, which is why most cars now beep at drivers if their seat belt isn't fastened. A bill in the California Legislature — which passed its first vote in the state Senate on Tuesday — would go further by requiring all new cars sold in the state by 2032 to beep at drivers when they exceed the speed limit by at least 10 m.p.h. (16 km/h).

“Research has shown that this does have an impact in getting people to slow down, particularly since some people don’t realize how fast that their car is going,” said state Sen. Scott Wiener, a Democrat from San Francisco and the bill's author.

The bill narrowly passed on Tuesday, an indication of the tough road it could face. Republican state Sen. Brian Dahle said he voted against it in part because he said sometimes people need to drive faster than the speed limit in an emergency.

"It’s just a nanny state that we’re causing here,” he said.

While the goal is to reduce traffic deaths, the legislation would likely impact all new car sales in the U.S. That's because California's auto market is so large that car makers would likely just make all of their vehicles comply with the state's law.

California often throws its weight around to influence national — and international — policy. California has set its own emission standards for cars for decades, rules that more than a dozen other states have also adopted. And when California announced it would eventually ban the sale of new gas-powered cars, major automakers soon followed with their own announcement to phase out fossil-fuel vehicles.