Gov. Charlie Baker has some advice for Massachusetts drivers: Buckle up and put your phone down.

The governor on Tuesday proposed his most sweeping set of road safety rules yet, calling for Massachusetts to join 16 other states in requiring hands-free cell phone use while driving and proposing to allow police to stop motorists for not wearing a seat belt. The legislation filed by the Republican marks the first time Baker has put forward his own hands-free driving bill since he first came out in support of the idea in late 2017.

The governor packaged the hands-free driving proposal and a primary seat belt enforcement provision with a number of reforms that Baker has advocated for in recent years, including mandatory lower speed limits in work zones. "Keeping the Commonwealth's network of roads as safe as possible for everyone using them is one of our administration's top public safety priorities," Baker said in a statement, calling the legislation a "common sense" proposal to reduce distracted driving.

Drivers in Massachusetts are already required under law to wear seat belts or be fined, but police are not allowed to pull a vehicle over for a seat belt infraction unless they have another reason to do so. Opponents of primary enforcement have raised concerns in the past about racial profiling.

The bill would also require anyone convicted of a first offense for operating under the influence who applies for a hardship license to use an ignition interlock device for a minimum of six months, and be subject to penalties from the Registry of Motor Vehicles for attempting to drive after drinking or tampering with the device.

According to the state, 15,662 people were seriously injured on roads in Massachusetts between 2012 and 2016 and 1,820 were killed, including nine road workers.

Baker in 2017 filed a bill to enforce lower speed limits in highway construction zones, which are currently just suggestions. At that time, Baker came out in support of a hands-free driving requirement, based in part on advancements that made in-vehicle computers and Bluetooth devices cheaper and more accessible. His new position represented an evolution from just nine months earlier when he said, "I don't want to get out of the business of making it possible for people to talk to other people when they're driving. Because I think the texting thing is a big problem. I'm not sure I believe that the talking thing is."