US US-23 Fl Flex ex Rout Route Pa Part rt-Time Shou e - - PowerPoint PPT Presentation

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US US-23 Fl Flex ex Rout Route Pa Part rt-Time Shou e - - PowerPoint PPT Presentation

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US US-23 Fl Flex ex Rout Route Pa Part rt-Time Shou e Shoulder O er Opera erations Stephanie Palmer, P.E. University Region Michigan Department of Transportation April 23 rd , 2019 US US-23 B 23 Backg kground und Located

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SLIDE 1

US US-23 Fl Flex ex Rout Route Pa Part rt-Time Shou e Shoulder O er Opera erations

Stephanie Palmer, P.E. University Region Michigan Department of Transportation April 23rd , 2019

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SLIDE 2

US US-23 B 23 Backg kground und

  • Located North of Ann

Arbor

  • Recurring Directional

Peak Hour Congestion

  • Non-Recurring

Congestion

  • Incidents
  • Special events
  • Interchange and Mainline

Operational Issues

  • Road and bridge

improvements already planned

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SLIDE 3

US US-23 A 3 Active ve Traffic Manage gement nt

  • System Details:
  • 8.5 Miles long
  • Truss style gantry system

spaced at ½ mile

  • 5’ x 5.5’ Lane Control Signs
  • 9 Small DMS
  • Cameras and detection
  • ATM Strategies:
  • Dynamic Shoulder Use
  • Dynamic Lane Use
  • Variable Speed Advisories
  • Queue Warning
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SLIDE 4

Dyna ynamic S Shoul houlde der U Use

  • Using the median shoulder for directional peaks
  • Scheduled to open during weekday peaks:
  • Southbound from 6:00 to 9:30 AM
  • Northbound from 3:00 to 7:00 PM
  • Also an alert when congestion thresholds are met
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SLIDE 5

Spe peed d Thr hreshol holds ds

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SLIDE 6

Vol

  • lum

ume T Thr hreshol holds ds

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SLIDE 7

Ope peni ning ng t the he Dyna ynamic S Shoul houlde der

  • Operator must verify that the

shoulder is free from obstructions before opening

– Freeway Courtesy Patrol – Low Light Cameras

  • Developed Standard Operating

Procedures

– Developed Quick Reference Guides to assist operators

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SLIDE 8

Removi

  • ving

ng O Obs bstruction f

  • n from
  • m

Dyna ynamic S Shoul houlde der

  • Determined how

each blockage should be handled

  • Normal procedures

for most types of blockages

  • Disabled vehicle

procedure involved an agreement with MSP

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SLIDE 9

Dyna ynamic S Shoul houlde der O Ope peration

  • n
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SLIDE 10

Shou

  • ulde

der U r Use for I Incide dent nt M Mana nagement

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SLIDE 11

Shou

  • ulde

der U r Use for M Maint ntena nanc nce O Opera ration

  • ns
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SLIDE 12

Fle lex Route te I ITS Syste tem R Relia liabili lity ty

  • Goal of 97.5 percent system

reliability

  • ITS maintenance efficiencies used

to improve overall repair times

  • Winter Weather

– Treat shoulder as 3rd lane – Snow removal of median shoulder – Opening the shoulder during winter snow event (especially morning peak)

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SLIDE 13

Speed eed P Per erformance B Bef efore re

12 AM 2 AM 4 AM 6 AM 8 AM 10 AM 12 PM 2 PM 4 PM 6 PM 8 PM 10 PM

Project Limits Project Limits Northbound Southbound

12 AM 2 AM 4 AM 6 AM 8 AM 10 AM 12 PM 2 PM 4 PM 6 PM 8 PM 10 PM

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SLIDE 14

Speed Performance A e After er

12 AM 2 AM 4 AM 6 AM 8 AM 10 AM 12 PM 2 PM 4 PM 6 PM 8 PM 10 PM

Project Limits Project Limits Northbound Southbound

12 AM 2 AM 4 AM 6 AM 8 AM 10 AM 12 PM 2 PM 4 PM 6 PM 8 PM 10 PM

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SLIDE 15

Flex x Rout

  • ute P

Performanc nce S Sum ummary

  • Early Results- improvements in travel time and reliability- especially for southbound

US-23

  • SB US-23 planning time improvement over 50% (from 22 mins to 10 mins)
  • SB US-23 average travel time savings of about 5 minutes (for 8.5 miles)
  • SB US-23 speed increases of 19 mph (from 43 mph to 62 mph)
  • NB US-23 also showing improvements
  • Current research project will further investigate performance
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SLIDE 16

Que uestions ns?

Stephanie Palmer palmers3@Michigan.gov