adaptive signals and access management efforts · 2013. 9. 17. · high cycle lengths opportunity...
TRANSCRIPT
Adaptive Signals and
Access Management Efforts
A Well Rounded Disaster Residential o Single Family oApartments/Condos
Commercial oBig Box Retail oHigh Turnover Sit down and Fast Food Restaurants o Lodging
Office Space
Existing Roadway Characteristics -Six-lane divided arterial -Posted speed limit of 55 mph -Daily Volume 60k-80k -25 signals in study area (9 mile segment) -Recurring peak hour congestion -Roadway is over capacity -Congestion costs users in time and fuel -Existing signals utilize time based coordination
Existing ITS Technologies
1. Overhead Dynamic Message Sign
2. Opticom Emergency Preempt
Adaptive Signal System Three Separate Installations in Alabama ◦ Birmingham ◦ Huntsville ◦ Montgomery
Sydney Coordinated Adaptive Traffic System (SCATS) ◦ Chosen for all three deployments in Alabama
PROJECT INFORMATION
• Winning bid of $ 1.9 mill • Awarded to American Lighting and Signalization (ALS) • Southern Lighting and Traffic Systems (SLTS) – Vendor • Transcore – Vendor • Wenlight – Fiber Technician • Work begins May-June 2012
Equipment Upgrades
Siemens M52 Controllers Autoscope Video Cameras Ruggedcom ethernet switches
And So It Begins………..
Confusion over camera angles and height Plans call for 15’ stop line detection zones Meeting of the minds…….. Build what’s on the plans
Now go flip the switch!
WHAT HAPPENED NEXT????????????
MASS HYSTERIA !!!!!!!!!!!!!
Wait…… What Just Happened Here???
• Signals mostly run minimum time and gap out • Side streets backed up for miles • Snappy bar comes to light • Gap times become a big issue • Can’t live with this!
The Wonderful World of Social Media
So What’s This Snappy Bar Thing?
• Developed by Econolite to work with SCATS • Utilizes 30’ presence zone during red portion
of phase • Shortens to 15’ zone during green portion of
phase to aid in count accuracy
CAN’T LIVE WITH THIS!
• Make it work…… Please • Some cameras relocated • Detection zones adjusted for 30’ presence and
15’ gap extension
Getting on the right track…
Tweaking begins Off peak improvements start to appear Still experience supersaturated conditions on
the mainline in the peak hours Tracking travel times through BlueTOAD
Getting on the right track…
SCATS systems greatest nemesis?
Distracted Drivers! aka Jokers with cell phones
Distracted Drivers Negative Impacts High cycle lengths Opportunity to become distracted First car leaves stop line, second car just sits Predominately single left turn lanes Signal gaps out then reduces time allotted for
next cycle Queues back out into through lanes
Other Negative Impacts
Driver placement (stop well behind stop line) Sun glare (one intersection) Emergency Pre-emption during peak hours Intersection lighting during dark hours (side
fire camera placement)
Development of the ALDOT 280 Team
Give me my Czar! Dedicate a P.E. to the corridor Give that P.E. two employees of their choice Give that employee the tools to be effective Support that employee through presence
UP NEXT?? ACCESS MANAGEMENT!
Remove, add, and modify traffic signals Increase turning capacities Michigan left 27 improvements developed
Positive Impacts of Access Management
Other Efforts
Alabama Service and Assistance Patrol Expansion Contract wrecker service @better280 twitter account
On the Horizon
8 PTZ Cameras BlueTOAD expansion Connection of Terra Cards to remotely view zones at
new intersections Autoscope Duo
The Next Big Thing
Grandview Medical Center
The Next Big Thing
Grandview Medical Center
The Wonderful World of Social Media
West End Travel Times to Date
ALDOT 280 Team
Brett J. Sellers, PE ALDOT 3rd Division
205-581-5659 [email protected]
Richard Allen, Jr ALDOT 3rd Division
205-581-5922 [email protected]