Metro is looking at the impact of adding rail-crossing gates along the Gold Line on 3rd Street.
The study is intended to gauge how the crossing gates would work for drivers and pedestrians.
Metro says the gates and new stop lights would definitely put the brakes on commuters' travel time.
"When the lights change they detect the train up to 30 seconds before it arrives. Then they hold it for 30 seconds after the train passes through. So a minimum of a minute all-red signal-phase time," said Metro Transportation Planning Manager Eric Carlson.
Metro is considering adding rail crossing gates at 24 locations along the Gold Line.