WHEAT RIDGE, Colo. (CBS4) – After months of delays, testing on RTD’s new G-Line begins Wednesday.
The line runs from Union Station in downtown out to Wheat Ridge.

(credit: CBS)
If you live along the lines, expect to hear train horns. Be aware, too, of the crossing gates.

(credit: CBS)
The testing is the first step to the actual opening of the line to riders.