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

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 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

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

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

Spe peed d Thr hreshol holds ds

Vol olum ume T Thr hreshol holds ds

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

Removi oving ng O Obs bstruction f on from om 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

Dyna ynamic S Shoul houlde der O Ope peration on

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

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

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)

Project Limits 12 AM 2 AM 4 AM 6 AM Southbound 8 AM Speed 10 AM 12 PM eed P 2 PM 4 PM 6 PM Per 8 PM 10 PM erformance B 12 AM 2 AM Bef 4 AM 6 AM efore Northbound 8 AM 10 AM re 12 PM 2 PM 4 PM 6 PM 8 PM 10 PM Project Limits

Project Limits 12 AM 2 AM 4 AM 6 AM Southbound 8 AM Speed Performance A 10 AM 12 PM 2 PM 4 PM 6 PM 8 PM 10 PM 12 AM e After 2 AM 4 AM 6 AM Northbound 8 AM er 10 AM 12 PM 2 PM 4 PM 6 PM 8 PM 10 PM Project Limits

Flex x Rout oute 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

Que uestions ns? Stephanie Palmer palmers3@Michigan.gov