Massachusetts drivers should soon have a little extra help navigating the state's traffic hotspots.

Transportation officials are launching a new, $17.5 million project to place 132 automated travel time signs on roadways across the state.

The federal government will pick up the bulk of the tab. Officials  flipped the switch on the first permanent signs on Route 6 on Cape Cod and will expand statewide, wrapping up by the end of 2015.

There are currently about 66 of the portable signs positioned on roads across Massachusetts.

The signs anonymously track Bluetooth-enabled devices carried by motorists and their vehicles in real time to estimate how long it takes to travel between two locations.