downtown signals traffic analysis · 2018-04-17 · coordinated signal system 7. ... • advantages...

April 16, 2018

Downtown Signals Traffic Analysis

City of St. Mary’s

Presented by:

Allan Heitbrink, P.E. & Craig Eley, P.E.

Who We AreCraig Eley, P.Eo Previously the ODOT D7 Traffic

and Safety Engineer.o 25+ years in traffic.o Responsible for approximately

140 signalized intersections, performed maintenance, installation, upgrades, etc.

o Project Engineer on major signal upgrades in Bellefontaine and Urbana.

o Retired from ODOT in 2014.o Joined Choice One in 2015.

Allan Heitbrink, P.E.o Graduated from University of

Dayton in 2013, BS in Civil Engineering.

o Joined Choice One in 2013.

o Northwestern Center for Public Safety in Chicago, 2014.

o Concentrating on traffic engineering.

o Project Engineer and Lead Designer on 35 traffic signals.

So Why Study?• OMUTCD – Ohio Manual of Uniform Traffic Control Devices• Signal Warrants –

1. Eight-Hour Vehicular Volume2. Four-Hour Vehicular Volume3. Peak Hour4. Pedestrian Volume5. School Crossing6. Coordinated Signal System7. Crash Experience8. Roadway Network9. Intersection Near a Grade Crossing



• Basis for Installation or Removal



• Basis for Installation or Removal• Advantages & Disadvantages



• Basis for Installation or Removal• Advantages & Disadvantages• As maintaining agency – periodic review of all traffic signals is necessary.



• Basis for Installation or Removal• Advantages & Disadvantages• As maintaining agency – periodic review of all traffic signals is necessary.• Funding – need to know if the traffic signals are warranted.



• Basis for Installation or Removal• Advantages & Disadvantages• As maintaining agency – periodic review of all traffic signals is necessary.• Funding – need to know if the traffic signals are warranted.• Suggested improvements for the signals remaining.

Project Information• Analyzed thirteen (13) signalized intersections in the downtown area• Reviewed the operations and timing at each location

• Locations included: 1. High & Wayne2. High & Main3. High & Front4. Spring & Wayne5. Spring & Main6. Spring & Front7. Spring & Ped. #18. Spring & Ped #29. Spring & Chestnut10. Spring & Spruce11. Spring & Pine12. Spring & Vine13. Main & South

• Analysis included: turn movement counts, signal warrant analysis, operations analysis, and recommendations for potential operation improvements.

Map of Improvements

Existing Signals to be Rebuilt

• Main & High, Main & Spring, Main & South, Spring & Spruce to be rebuilt/upgraded in the future as funding allows



MAIN STREET & HIGH STREET:• Upgrade signal to meet OMUTCD & ODOT

Standards.• Adjust signal timing.• Add a left turn phase for the NB and SB

directions.• Add side and main street detection.• Install pedestrian signals/pushbuttons.• Update curb ramps.



MAIN STREET & SPRING STREET:• Upgrade signal to meet OMUTCD & ODOT

Standards.• Adjust signal timing.• Add a left turn phasing.• Add side and main street detection.• Install pedestrian signals/pushbuttons.• Update curb ramps.• Install left turn signs to mast arms.



SPRING STREET & SPRUCE STREET:• Upgrade signal to meet OMUTCD & ODOT

Standards.• Adjust signal timing.• Add side and main street detection.• Install pedestrian signals/pushbuttons.• Update the SE & NE curb ramps.



MAIN STREET & SOUTH STREET:• Upgrade signal to meet OMUTCD & ODOT

Standards.• Adjust signal timing.• Add side and main street detection.• Install pedestrian signals/pushbuttons.• Update the curb ramps.

Existing Signals to be Removed

Wayne St. & High Street

• Remove existing traffic signal and install four-way stop.

• Existing poles and overhead lights to remain.

• Existing signal is not warranted.

• No intersection sight distance issues.

• 2 crashes in 3 years.

High St. & Front Street



• 4 crashes in 3 years.• On-street parking to

remain.• Update curb ramps

to meet current ADA requirements.

Wayne St. & Spring Street


• Strain poles are to remain, since luminaires are on the poles.


• 3 crashes in 3 years.

• Remove existing traffic signal with Spring Street Reconstruction project. Install two-way stop along Front Street.


• Buildings create ISD problems.• 8 crashes in 3 years.

Spring St. & Front Street

• Remove existing traffic signal with Spring Street Reconstruction project. Install two-way stop along Front Street.


• Buildings create ISD problems.• 8 crashes in 3 years.

Spring St. & Front Street

Bump outs – Increase ISD & shorter pedestrian crossing

• Remove existing pedestrian signal.

• Install pedestrian signs and enhance crosswalks with pavement markings.

• Existing signals are not warranted.

• 2 crashes at West crossing

• 4 crashes at East crossing

Pedestrian Crossings& Spring Street

• Remove existing pedestrian signal.

• Install pedestrian signs and enhance crosswalks with pavement markings.

• Existing signals are not warranted.

• 2 crashes at West crossing

• 4 crashes at East crossing

Consider installing a Rectangular Rapid Flashing Beacon (RRFB)

Pedestrian Crossings& Spring Street

• Remove existing traffic signal with Spring Street Reconstruction Project.

• Install two-way stop along Chestnut Street.

• EB approach should be restriped to a single Left/Thru/Right lane.

• Update curb ramps to meet ADA requirements

• Signal is not warranted.• 4 crashes in 3 years.• Buildings on SE & SW corners

create ISD problems.

Chestnut Street & Spring Street

• Remove existing traffic signal with Spring Street Reconstruction Project.

• Install two-way stop along Chestnut Street.

• EB approach should be restriped to a single Left/Thru/Right lane.

• Update curb ramps to meet ADA requirements

• Signal is not warranted.• 4 crashes in 3 years.• Buildings on SE & SW corners

create ISD problems.

Chestnut Street & Spring Street

Bump outs improve ISD

Spring Street & Pine Street

• Signal is not warranted.

• 4 crashes in 3 years.• Remove existing

traffic signal.• Install two-way stop

along Pine Street.• Remove 1-2 spots to

further enhance ISD.• Update curb ramps

on NW & NE corners.

Spring Street & Vine Street

• Signal is not warranted.• 4 crashes in 3 years• Remove existing traffic

signal.• Install two-way stop

along Vine Street.• Remove approx. 100 ft. of

parking along the east leg of Spring St. on the north side to increase ISD.

• Update the NW & NE curb ramps.

Map of Improvements

QuestionsCraig MoellerCity of St. Marys419.394.3303 [email protected]

Craig EleyChoice One [email protected]

Allan HeitbrinkChoice One [email protected]

downtown signals traffic analysis · 2018-04-17 · coordinated signal system 7. ... • advantages...

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