INDIANAPOLIS (AP) — The Indiana Department of Transportation says its crews will begin making changes this week aimed at reducing collisions at certain intersections around the state.

The agency said the “intersection conflict warning systems” are being put in place to alert drivers of traffic at two-way, stop sign-controlled intersections.

The new systems use signs and flashing yellow lights to warn drivers either approaching an intersection on a major road or waiting at the stop sign to enter the intersection from a minor road.

The Federal Highway Administration says the systems can reducing severe crashes by up to 30 percent.