ACTIVE TRAFFIC MANAGEMENT: DESIGN & OPERATIONS …...ACTIVE TRAFFIC MANAGEMENT: DESIGN & OPERATIONS...
Transcript of ACTIVE TRAFFIC MANAGEMENT: DESIGN & OPERATIONS …...ACTIVE TRAFFIC MANAGEMENT: DESIGN & OPERATIONS...
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ACTIVE TRAFFIC MANAGEMENT:DESIGN & OPERATIONS CHALLENGES
ON THE ILLINOIS TOLLWAYJim Powell, PE, PTOE
CDM Smith Inc.
IBTTA MAINTENANCE &ROADWAY OPERATIONS WORKSHOP
Harrisburg, PAJune 25, 2018
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PRESENTATION OVERVIEW:
Concept & General Approach Design
• Smart Corridor Elements• Power, Communications & Site Features
Operations• Lane-Use Control (LUC) displays• Response Plans & Scenarios
Future Implementation
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INITIAL CORRIDOR: I-90
62 MILES TOTAL – 16 WITH ATM INITIALLY
“Flex Lane”
Gantry Lane Control Signs + DMS
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• Desire to “do it right” - previously had to rebuild median wall (new structure foundations)
• Already have electronic toll collection & fiber everywhere
• Talked to FHWA, visited Washington State DOT and Virginia DOT
• Lessons learned
½ mile gantry spacing still good & frequent DMS
2 Gantry advance messaging best - any more & drivers ignore
CONCEPT: SMARTROAD FOR THE FUTURE
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• Lessons learned (cont.)
Need public & media outreach – variable speed limit fared badly in the press
(Instructional video)
Yellow arrow displays:
GENERAL APPROACH
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• Inside shoulder – “Flex Lane” for Pace transit
• ATM gantry foundations built where ATM expected in future: ½ mile spacing for 22 miles
• Increased shoulder DMS - every other gantry
• Intermediate power & communications buildings every 2 miles
DESIGN FOR SMARTROAD
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DESIGN: POWER, COM. & SITE FEATURES
• CCTV cameras everywhere
• Power & backbone communications with redundancy
• Median wall fiber & conduit with lateral conduit
• Safe parking near buildings & devices for maintenance
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I-90 SMARTROAD – DISPLAY SUMMARY
plus large DMS ~every 5 mi.
Every other gantry
Every other gantry
Shoulder DMS
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• ATM gantries: 29
• ATM lane control signs: 354
• CCTV: +35 cameras
• DMS: +8
• Detector stations: +75
I-90 SMARTROAD – ATM SUMMARY
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OPERATIONS: RESPONSE PLANS• Concept of Operations looked at nine common scenarios
Clear presentation of response plans Consistent workflow Ability of operators to review & activate
Clear RulesConsistent Messaging
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I-90 ATM BEFORE/AFTER STUDY
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ATM IN ACTION
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ATM IN ACTION
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ATM IN ACTION
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ATM IN ACTION
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DESIGN LESSONS LEARNED
• ATM gantry placement
Must be located before locating static sign gantries
Must be placed in conjunction with striping & lane geometry
Avoid bridges
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OPERATIONS LESSONS - “TO BE LEARNED”
• As more incident experience gained:
Stored response plans must be updated, e.g., display lane use instructions further upstream?
More detailed evaluation of ATM performance
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FUTURE IMPLEMENTATION
• I-90 a warmup for I-294
PotentialATM Lite on parts of I-294
I-90
I-294
ATM LITE
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Next MUTCD not likely until ~2020!
Reach out to NCUTCD or joinwww.ncutcd.org
Monitor the FHWA website (for NPA)mutcd.fhwa.dot.gov/
Monitor your state DOT web site
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FHWA MUTCD – THE “LAW”
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Thanks !
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