Signal lights go into “flash mode” during certain hours of the day; report synchronized traffic signals, flashing yellow left turn arrow signals, installation of detectors in at least 10% of city signals (operated under traffic actuated/responsive mode). Report roundabouts under best practice action 11.6
Work with the county/MnDOT to interconnect traffic signals and coordinate them in one corridor; install one or more bicycle crossing signal detectors; implement traffic signs over signals in lower-traffic areas to minimize costs
Provide estimates of reduced delays, gas use, stops; work with the county/MnDOT to interconnect/coordinate among traffic signals and synchronize them along several corridors.
Who's doing it
Albert Lea - 3 star
Date action report first entered:
Date of last report update:
Year action initially completed:
All new traffic signals are synchronized with existing traffic signals when installed to minimize idling and maintain optimal traffic flow.
Dakota County has interconnected and synchronized 24 traffic lights along 7 miles of county roads in Apple Valley, including:
"County Road 42 from Elm Drive to Flagstaff Ave. and from Johnny Cake Ridge to Diamond Path
"Cedar Ave. from 140th St. to 160th St.
"County Road 46 from Galaxie Ave. to Flagstaff Ave.
South Loop District Wayfinding (2011, 2015-16)
Increased efficiency of existing roadway network by balancing traffic on the routes within the District, delaying or eliminating the need for geometric improvements. Joint effort by City of Bloomington, Mall of America, and MnDOT.
EECBG Signal Timing Optimization (2010-11)
Reduced average fuel consumption and emissions by improving traffic mobility, decreasing travel times, traffic delays, and the number of vehicle stops at 37 signalized intersections. Estimated annual savings of 112,600 gallons of gasoline, estimated annual reduction of 9,900,071 vehicle stops, estimated annual reduction of 113,137 hours of vehicle delay. Overall project benefit to cost ratio of 24.
PRO (Parallel Route Optimization) (2010-11)
Reduced average fuel consumption and emissions by improving traffic mobility, decreasing travel times, traffic delays, and the number of vehicle stops along the parallel routes to I-494 in Richfield and Bloomington. Joint effort to optimize traffic signals by Cities of Richfield and Bloomington, MnDOT, and Hennepin County.
All of the city's traffic signals utilize loop detectors and a majority are synced with a grouping of other traffic signals. The city does coordinate with MnDOT to synchronize signals along the 210/Washington Street and Business 371 corridors.
" There are 67 signals in the city:
o 22 owned by the City
o 30 owned by the County
o 16 owned by the State
Signals synchronized owned by the City are along Nicollet Avenue and Burnsville Parkway:
o Nic. \Burns. Pkwy.
o Nic.\ Travelers Trail
o Nic.\126th Street
o Nic.\130th Street
o Nic.\134th Street
o Burns. Pkwy. \Harriet Ave.
o Burns. Pkwy.\Pleasant Ave.
o Burns. Pkwy.\Travelers Trail
The City use to have the signals along Southcross Drive synchronized as well but over the last five years we removed them since there wasnt enough traffic on the roadway and the side roads were waiting too long.
Burnsville has worked with Mn/DOT on synchronizing the signals along T.H. 13/ Nicollet Avenue and Burnsville Parkway /35W.
Dakota County has done their own synchronizing on CSAH 42. Burnsville gives input to the County on any issues we have with delay of traffic flow, and works with the County during holidays to make sure traffic flow is changed during that time. The County is installing fiber optic to help with synchronizing their signals on CSAH 42 and the City is helping in financing and giving input. The City has requested the County consider installing a CMAQ grant for software analysis packages which would quickly generates optimum timing plans to minimize delay and to model the traffic flow.
The City works with Anoka County Traffic Engineers to ensure traffic signals maximize efficiency. Coon Rapids has coordinated various roads including busier streets like Coon Rapids Blvd, Round Lake Blvd, Main St and University Ave. When roadways are reconstructed, typically fiber interconnect is added at that time to connect the signals. In 2014 new fiber will be added on Foley Blvd between 101st and Egret Blvd, and on University Ave between 109th and Main St. In addition, Coon Rapids through Anoka County has received Federal funding to purchase Centrax Traffic Signal Monitoring software in 2014 which will be utilized to work further toward monitoring and optimizing our interconnected traffic signal systems. These practices ensure traffic moves efficiently and car idling is reduced whenever possible.
Cottage Grove maintains two traffic signal corridors (80th street and Jamaica) which include signals owned by Washington County. The City is in agreement with Washington County and MnDOT to maintain and corrdinate our signals continuously through those two corridors. The most recent synchronization was in March of 2012 when traffic counts were taken for all intersections, timing changes were made in corrdination with Washington County and MnDOT to be sure signals in all corridors were running efficiently.
Cottage Grove has also implemented flashing yellow lights at the intersection of Jamaica/90th street/East Point Douglas to keep traffic flowing through instead of idling through entire signal rotaion.
Duluth’s Street Light Utility Division utilizes a continuous signal timing optimization program, Synchro traffic simulation software to develop signal timing plans and to preform signal optimization.
City of Duluth has flashing left turn arrow signals installed at:
Rice Lake Road & Arlington,
Rice Lake Road & Sawyer (MN Power's entrance), Trinity & Mall Drive.
All future installations will be Flashing Yellow Arrows
Interconnected traffic signals and coordination with other jurisdictions:
Currently the County has employed a timing consultant for the Mall Area Signals, all three jurisdictions will be involved, City, County and MN/Dot.
We have other coordinated systems although they are not joint with other jurisdictions.
• Grand Ave. from 44th West to 57th West,
• 21st Ave. East from London Road to St. Marie St on Woodland Ave.
• Downtown Central Business District, which includes 1st, 2nd, & 3rd Streets.
• 10th Ave. East from 1st St. through 3rd St.
All 43 traffic signals in Golden Valley have sensors in the pavement to help the signals work more efficiently which minimizes idling. All of the traffic signals along Highway 55 from Wirth Parkway west to Medina are interconnected to minimize car idling and promote the efficient flow of traffic. Some signals in Golden Valley that are close to Highway 55, such as the Golden Valley Road and Boone Avenue North intersection, are also coordinated. All new County signals are being upgraded to include video detection as well.
There are flashing yellow arrow left turn signals at the intersection of Golden Valley Road and Winnetka Avenue N and at the intersection of Xenia Avenue and Golden Hills Drive. There is a yield on green light left turn signal on Winnetka Avenue and 10th Avenue.
Renovation along White Bear Ave by the Maplewood Mall area included the synchronizing of traffic signals. Other street lights on the main roads of Maplewood are operated by a combination of the city and Ramsey county. One example includes the lights near the 36 & English interchange. A lot of work has been done to synchronize these streets to minimize car idling at intersections but also maintain safe and publicly acceptable vehicle speeds.This is a part of the living streets policy implemented in 2013 to all new construction and renovation projects. There is also a roundabout constructed near the Gladstone area in west Maplewood to reduce traffic congestion and idling times.
The City currently only has two traffic signals within City owned Right-of way (2 additional traffic signals within State or County ROW). The traffic signals within County or State ROW are coordinated to prevent car back-ups and idling. Previous traffic signals have been replaced with roundabouts which lessens car idling. Examples of roundabouts installed recently include: 2nd ST S and Pinecone RD; Heritage Dr and Pinecone Rd; Scout Dr and Pinecone Rd; 19th Ave and 6th ST S; Co RD 1 and Heritage Dr; Heritage Dr and Roberts Rd.
In August 2011, Washington County installed a new coordinated traffic signal control system at along Radio Drive from Afton Road to I94 (10 signals).
On Valley Creek Road, the new system spans from Century to Woodbury Drive (14 signals).
Along Woodbury Drive signals are coordinated from Park Crossing to I94 (7 signals).
There are a total of 58 traffic signals in Woodbury (city, county and state).
- 56 are full traffic actuated with vehicle detection
- 2 are wood pole with no detection
- 14 of the 56 with detection have flashing yellow (an additional 3 will be completed in 2013)
As of May 2013, there are currently twelve roundabouts within the City of Woodbury.
There are eleven (11) sets of traffic signals on Trunk Highway 197 within the City of Bemidji. All of these signals are synchronized by MnDOT in order to minimize car idling at intersections. This reduces levels of pollution while at the same time ensuring safe vehicle speeds and spacing.
Mankato Engineering staff designs signal timer systems to maximize smooth traffic flow and minimize wait times at stop lights, lowering emissions of idling traffic. In-ground sensors detect traffic flow and reduce stop lights at times of low-traffic volume to allow free-flow of traffic at off-peak times.
As part of the 35W MNPASS construction, all lights on Mounds View Blvd in Mounds View/Ramsey County along with the light at Spring Lake Road and County 10 (Mounds View Blvd.) have been timed and, new technology was incorporated uses satellite clock timing that automatically resets and synchronizes all lights to the same time. Previously, traffic pre-emption (emergency vehicles) use would alter the timing and requiring manual resetting of all lights. The new technology automatically resets all.
Outcome measures/metrics/money saved:
Increased traffic flow and reduction of idling at intersections.
The only corridor in Northfield where traffic lights are located is on MN TH3. These signals have been optimized by MNDOT and detectors have been installed in all six signal locations. Just recently we incorporated a safe bicycle crossing signal detector at TH3 & Second Street. This allows bicycles to trigger the light as well more efficiently.
Outcome measures/metrics/money saved:
We have received great feedback from the bicycle community about the bicycle light sensor. The other sensors have been installed for three years or longer. We are also working with MNDOT to implement a flashing yellow turn signal on the TH3 and Woodley intersection.
St. Cloud manages ELMS (Electric Light Management System) in an effort to promote traffic efficiency and safety as well as to minimize car idling. In the past few years, five roundabouts were built in the St. Cloud area also reducing idling time.
- Warren has decided to prioritize signage over signals allowing the city to meet the expectations of Action No. 4 as this has allowed the city to coordinate and synchronize the signage while optimizing timing to minimize car idling without comprising safety or legal vehicle speeds.
Outcome measures/metrics/money saved:
- The city has kept its operating costs in regards to energy spent on transportation signals fixed.
Over 50% of city traffic signals have loop detectors that allow better flow of traffic. Current policy is for all future city traffic signals to be controlled with loop detectors as they are replaced in the future.
The City, in partnership with Dakota County, has synchronized traffic signals on PK Rd, YD Rd and Cliff Rd for directional rush hours. The City also has 2 Round-abouts and 2 flashing yellow left turn arrow signals to reduce idling time. 3 more FYA's planned for 2011.
Outcome measures/metrics/money saved:
2 flashing yellow left turn arrow signals to reduce idling time
Hopkins has traffic signals on fully actualized systems wherever possible to minimize car idling at intersections, specifically on Excelsior Blvd and Hwy 7. The lights are either triggered by an overhead camera detecting a car's presence or from the pavement and a magnet loop. Traffic signals are only on timers if the traffic is considered too consistent. The benefit of this is minimized car idling to give off less CO2 emissions.
In 2011, a flashing yellow turn signals were installed at 42nd and Nevada avenues. In 2018, flashing yellow turn signals will be installed at 36th and Winnetka avenues, easing congestion and reduce the idling of cars.