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Traffic Engineering Division

Traffic Operations. Traffic Administration. Traffic Engineering Division. Construction and maintenance of traffic control devices. Engineering design Signal Coordination Traffic Studies Neighborhood Traffic Management. Traffic Engineering Division. Traffic Operations. Signals. Signs.

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Traffic Engineering Division

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  1. Traffic Operations Traffic Administration Traffic Engineering Division Construction and maintenance of traffic control devices. • Engineering design • Signal Coordination • Traffic Studies • Neighborhood Traffic Management

  2. Traffic Engineering Division • Traffic Operations Signals Signs Banners and Flags Pavement Markings Parking Meters

  3. Traffic Operations - Signals Electrical Shop: Maintenance of 270 signalized intersections and school flashers and flashing beacons.

  4. Traffic Operations - Signals Electrical Shop: Construction and upgrades of signalized intersections with digger derrick crew.

  5. Traffic Administration - Intersection upgrades Traffic signal upgrade: LED fixtures last longer, are brighter, & use less energy. • Old • New

  6. Traffic Operations - Signals Electronic Shop: Construction and maintenance of signal cabinets and controllers.

  7. Traffic Administration - Intersection upgrades Traffic cabinet upgrade: New controllers are more reliable and versatile. • Old • New

  8. Traffic Operations - Signs Sign Shop: Signs are Fabricated by screen printing and computer cut graphics.

  9. Traffic Operations - Signs Sign crews: Installing all signs in the city except Interstate and US Route markers.

  10. Traffic Operations - Signs Sign Crews: Maintain signs with top priority given to keep critical signs in place.

  11. Traffic Operations - Banners Banners: Hang and maintain banners in the Downtown District.

  12. Traffic Operations - Flags Flags: Hang and maintain flags on the Veteran’s Bridge.

  13. Traffic Operations - Pavement Markings Paint Shop: Painting 550 miles of lane lines per year.

  14. Traffic Operations - Pavement Markings Paint Shop: Mark lane lines in thermoplastic. New truck began in 2000.

  15. Traffic Operations - Pavement Markings Paint Shop: Crosswalks, stop bars, and arrows are in thermoplastic.

  16. Traffic Operations - Pavement Markings Paint Shop: Small thermoplastic jobs are done with the hand liner.

  17. Traffic Administration - Railroad crossing upgrades Railroad crossing upgrade: Resigning and using thermoplastic warning markings.

  18. Traffic Operations -Parking Meters Meter Shop: • Metered spaces provide parking space turnover which benefits businesses. • Approximately $450,000 per yr. revenue.

  19. Traffic Operations -Parking Meters Meter Shop: Electronic meters are replacing less reliable & higher maintenance mechanical meters.

  20. Traffic Operations Signals Signs Banners and Flags Pavement Markings Parking Meters Traffic Administration Engineering design Signal Coordination Traffic Studies Street Lights Neighborhood Traffic Management Traffic Engineering Division

  21. Traffic Administration - Engineering Design Creating signal, sign, and work zone traffic control plans. Design review and approval of site plans and subdivisions.

  22. Traffic Administration - Signal Coordination Actuated Signal Control: Loop detectors are embedded in the pavement.

  23. Traffic Administration - Signal Coordination Automated Signal Control: Microwave detector is triggered like a motion detector.

  24. Traffic Administration - Signal Coordination Coordinated Signal Control: Computer systems used for closely spaced signals to keep traffic moving.

  25. Traffic Administration - Signal Coordination Coordinated Signal Control: Downtown computer system consists of 76 signals.

  26. Traffic Administration - Signal Coordination Coordinated Signal Control: Signals can be set to move traffic at the speed limit.

  27. Traffic Administration - Traffic Studies Traffic Counts: TMC board used in signal timing studies.

  28. Traffic Administration - Traffic Studies Traffic Counts: Road tubes used to determine volumes on a roadway. Volumes used in determining if a signal is warranted.

  29. Traffic Administration - Traffic Studies Speed Studies: Radar gun used to determine 85th percentile speeds.

  30. Traffic Administration - Traffic Studies Accident Studies: Total number of Accidents per year.

  31. Traffic Administration - Traffic Studies TOP 10 HIGHEST ACCIDENT RATE LOCATIONS OF 2000 LOCATION NO. OF ACC. ACC.RATE* 1 M.L. King Blvd at Hwy 27 exit ramp and Pine St 26 4.70 2 Hwy 153 north exit ramp to Hixson Pike north 28 4.33 3 4th Ave at E 37th St 11 3.74 4 Access Rd entrance Ramp to Hwy 153 south 40 3.48 5 E. Brainerd Rd at Hickory Valley Rd & I-75 ramp 38 3.23 6 McCallie Av at Holtzclaw Av 34 3.19 7 E 4th St at Walnut St 14 3.00 8 E 4th St at Lookout St 13 2.93 9 8th St at Georgia Av 12 2.90 10 Moore Rd at Old Mission Rd 18 2.80 *number of accidents per million vehicles entering intersection

  32. Traffic Administration - Traffic Studies • Upgrade intersections to reduce accidents. • Adjust timing. • Add left turn phases. • Change signing or pavement marking.

  33. Traffic Administration Red Light Camera: Catch red light runners by taking a picture of their car and license plate.

  34. Traffic Administration - Guardrail Guardrail system: Speed zones of less than 40 MPH.

  35. Traffic Administration - Guardrail Guardrail system: Speed zones of 40 MPH or more.

  36. Traffic Administration - Sight Distance Sight Distance Triangle: Trim hedges for safety’s sake.

  37. Traffic Administration - Sight Distance Sight Distance: Before After

  38. Traffic Administration - Street Lights Street Lights: Field check street light requests for new installations.

  39. Traffic Administration - Street Lights Standard Street Lights: Shoe box type, full cutoff. Used in Central Business District.

  40. Traffic Administration - Street Lights Pedestrian Lights: Modified Ball and Basket with full cutoff. Used in Central Business District.

  41. Traffic Administration - Street Lights Pedestrian Lights: Acorn fixture with cutoff optics. Used in residential areas.

  42. Traffic Administration - Neighborhood Traffic Management • Neighborhood Traffic Management • Misconceptions More stop signs Lower Speed Limits Children at Play signs

  43. Traffic Administration - Neighborhood Traffic Management Too Many Stops: Reduces effectiveness of justified stops.

  44. Traffic Administration - Neighborhood Traffic Management Lower Speed Limits: Most drive at speed that feels right.

  45. Traffic Administration - Neighborhood Traffic Management “Children at Play” signs: Give a false sense of security.

  46. Traffic Administration - Neighborhood Traffic Management Neighborhood Traffic Management Program (NTMP): Petition the city for a study.

  47. Traffic Administration - Neighborhood Traffic Management NTMP Projects: Old Mission Traffic Circles -Have reduced speeds and volume by 25%.

  48. Traffic Administration - Neighborhood Traffic Management • Traffic diverters • Traffic islands • Speed tables • Textured pavement

  49. Traffic Engineering Division • Traffic Operations - 757-5355 • Report signs down or signal malfunctions • Traffic Engineering - 757-5005 • Request new installation or upgrade • Request NTMP

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