Westminster

Arvada

Lakewood

Littleton

Aurora

Parker

Denver

ThorntonBroomfield

Boulder

LongmontN

Overall ImprovementsProject Achievements

Performance Measures Daily Reduction

Vehicle travel time 213 hours

Fuel consumption 161 gallons

Time and fuel costs $5,150 savings daily ($1.29 million annually)

Greenhouse gas emissions 3,189 pounds

Emissions of six EPA- regulated pollutants 31 pounds

26th Ave

Bruce Randolph Ave

Welton StGlenarm

Stout StChampa St

30th St

29th Ave

28th Ave

31st St 31st Ave

Lawrence St

Walnut St

Marion St

MLK Blvd

24th Ave

22nd Ave

21st Ave

19th Ave

18th AvePark Ave

25th Ave

23rd Ave

Humbolt St High St

City and County of Denver 23 Signals

0

0

2

2

4

4

6

Travel Time (Minutes)

Average Travel Time Before Retiming

Average Travel Time After Retiming

Average Number of Stops Across Corridor Before Retiming (Less Idling)

Average Number of Stops Across Corridor After Retiming (Less Idling)

Morning Peak

Morning Peak

Nor

thbo

und

Nor

thbo

und

Sou

thbo

und

Sou

thbo

und

Morning Peak

Morning Peak

Midday/Off-Peak

Midday/Off-Peak

Midday/Off-Peak

Midday/Off-Peak

Evening Peak

Evening Peak

Evening Peak

Evening Peak

7:26

8.3

6:47

6.6

7:36

8.7

9:09

9.8

6:25

5.9

6:01

4.8

6:31

4.0

5:40

2.4

6:20

3.8

7:56

5.4

5:49

2.9

5:35

2.8

Number of Stops

6

8

8

10

10

Downing Street: Park Avenue to Walnut Street

Federal Funds for Denver

DRCOG engineering staff developed the signal timing and coordination plans in partnership with the project stakeholders.

Project ScopeDowning Street (7.0 miles)

Approximately 15,900 vehicles

per day

• 80 buses per day on Downing • Approximately 4,700 transit riders on weekdays

SIGNAL TIMING

PROJECTBRIEF

The Denver Regional Council of Governments (DRCOG) leads multijurisdictional partnerships to achieve optimal signal timing and coordination on area roadways. Traffic signal timing adjustments provide the smoothest possible flow for cars, trucks and buses. At the same time, safety is enhanced for all users, including pedestrians and bicyclists. Signal timing optimization saves drivers time and money, minimizes greenhouse gas and pollutant emissions, and enhances air quality.

May 2016 - T16-8

Downing Street: Park Avenue to Walnut Street

Traffic signal coordination allows traffic to travel along a street without stopping at every light. A major component of any coordinated signal-timing plan is properly sized cycle length shared by each intersection along the corridor. The cycle length is the time required for one sequence of signal displays (green, yellow and red) around an intersection to be lit for each approach. DRCOG’s engineers evaluate cycle lengths to strike a balance between intersection capacity and delay for all users. The cycle lengths vary by time of day to account for fluctuating numbers of vehicles, bicyclists and pedestrians.

1290 Broadway, Suite 100 Denver, Colorado 80203

Main 303.455.1000 Fax 303.480.6790 drcog.org

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For more information about signal timing, see: bit.ly/SignalRed For more information about DRCOG’s traffic operations program, see: bit.ly/TrafficOps

Traffic Signal Coordination

Time of day 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:301 Downing St & Park Ave

90-second cycle

2 Downing St & 18th Ave3 Downing St & 19th Ave4 Downing St & 21st Ave5 Downing St & 22nd Ave6 Downing St & 23rd Ave7 Downing St & 24th Ave8 Downing St & 25th Ave9 Downing St & 26th Ave

10Downing St & 28th Ave/ Glenarm Pl/30th St

11 Downing St & 29th Ave/Welton St12 Downing St & 31st Ave/Stout St13 Downing St & MLK Blvd/Champa St14 Downing St & Bruce Randolph Ave15 Downing St & Lawrence St16 Downing St & Walnut St17 Marion St & Walnut St/38th St18 23rd Ave & Humbolt St19 23rd Ave & High St20 31st Ave & Marion St21 MLK Blvd & Marion St22 Champa St and 31st St23 Champa St and 30th St