RTD, Denver Public Works Prep to Speed Up Buses on Six City Streets

Federal Boulevard and West Colfax Avenue are among the corridors slated for "transit signal priority."

An RTD bus on Federal Boulevard
Photo: Leslie Twarogowski

When cities want to, there’s a lot they can do to make bus service faster and more reliable. One of those transit improvements involves tweaking traffic signals so bus riders spend less time stopped at red lights and get to their destinations faster. Denver Public Works and the Regional Transportation District are planning to do just that on six streets in the city.

The technique is called “transit signal priority.” It enables approaching buses to communicate with traffic signals and either extend a green light or turn a red light green.

RTD and DPW have picked Federal Boulevard, West Colfax Avenue, Downing Street north of Colfax, and East 17th, 18th, and 12th avenues as the first streets to receive transit signal priority. Bus ridership is high on those streets, but bus speeds are slow.

“This is what would benefit RTD’s customers the most and provide RTD benefits as well in terms of reducing travel times,” Jeff Becker, a service development manager with RTD, told the agency’s Board of Directors on Tuesday.

Signal priority at 17 intersections, combined with modifications like bus stop consolidation, bus bulbs, and queue jumps (where buses get a head start on a green light, ahead of other traffic at the signal), would shave about five minutes off bus trips on the six-mile stretch of Federal between 38th and Evans, according to the report. Add that up for everyone who rides the route, and it’s a cumulative time savings of 234 hours every day.

“Minutes matter to us,” Becker said. “Minutes matter.”

Traffic signals are DPW’s responsibility, and the agency is all in favor of these changes. DPW has identified some funding for Federal and West Colfax, according to Ryan Billings, a city transit planner. On Federal the upgrades would cost an estimated $1.35 million — but most of that cost is for physical changes to the streets.

The cost of traffic signal priority plus other suggested improvements. Image: RTD
The cost of traffic signal priority plus other suggested improvements. Image: RTD

RTD would likely pitch in too. Both agencies are waiting on a more in-depth cost analysis for all the streets.

“We’re not talking about millions and millions, hundreds of millions, or billions,” Becker told the Board. “We’re talking about modest costs to get a fairly substantial improvement. “It’s nice to know that cities are very much interested now — they weren’t so much five or six years ago — in encouraging transit ridership.”

“If we can work together with the cities, the counties and everybody to do this, this will be great,” said District L Director Lorraine Anderson.

RTD also identified Havana Street in Aurora and Broadway in Boulder as top candidates for transit signal priority.


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