Speeds lowered on two dangerous Dallas roadways highlighted in NBC 5's Driven to Death series

Drivers will see lower speed limit signs on U.S. 75/Central Expressway from Downtown Dallas to Mockingbird Lane. Lower limits are also posted now on Loop 12 in Southern Dallas. NBC 5 senior investigative reporter Scott Friedman reports lower speeds are just the beginning of safety changes on the way after our Driven to Death investigative series.