Positive train control software updates and testing continue tonight; Train horns will sound during the process

RTD and its concessionaire Denver Transit Partners (DTP) are in the process of installing updated positive train control (PTC) software. This means that continuing today through Wednesday night, some trains will need to sound their horns on the University of Colorado A Line and G Line as they go through the grade crossings.

The software update and testing is necessary for efficient and reliable operation of PTC all in the name of safety.

We are sorry for the disruption and inconvenience this may cause. We will keep you posted if testing is extended. Thank you for your patience.