Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
1. ACS Lite Econolite
3. ACS Lite - Development Experience Involved from outset of project – bleeding edge
Initial effort focused on architecture and ACS Lite Object development
Preliminary concept of working through Master was not practical due to high development costs and risk.
USE of NTCIP and ACS Lite Objects allowed develop teams (Siemens ITS, ITT and Econolite) to work fairly independent of each other
Teams worked well together and open and frequent communications kept developers in the loop.
Initial lab integration with CORSIM went fairly well after all interfaces were understood.
No major surprises during field integration
4. ACS Lite - Implementation Field Test – Gahanna, Ohio
CORSIM lab simulations and Gahanna field tests implemented with ASC/2S controllers.
Modified version of ASC/2S NTCIP 1B software. Modifications implemented support and functionality of required ACS Lite MIB objects.
NTCIP 1202 ASC Objects used by ACS Lite application that were not supported by ASC/2S were handled using ASC/2S MIB objects via ACS Lite API.
Additional detection required for phase utilization data as test intersections were semi-actuated.
5. ACS Lite - Implementation Communication Architecture
Standard interface maintained for Master (ASC/2M) to Local communications. Allows full functionality of existing closed loop system (Aries).
Separate NTCIP communication path to Local controller for ACS Lite application. Uses ASC/2S Port 2 in test site application.
Separate data rates and interfaces supported on the two communications paths (Gahanna used twisted pair at 1200 & 9600 bps).
User could disable ACS Lite remotely via closed loop system if problems found.
7. ACS Lite - Outlook Promising cost effective adaptive control system solution for small systems
Good alternate to traditional Traffic Response control in closed loop systems
Typically easier to implement.
May require additional detection for phase utilization and flow profile.
Comparison with well timed Traffic Responsive system needs to be evaluated.
Next generation Field Masters will support NTCIP so integration will be simplified
ACS Lite algorithms should be able to run on the same field processor as the Master giving user option of TOD, TR or Adaptive control
Single communications channel to locals
8. ACS Lite - Outlook Next Steps
Become familiar with software and algorithms after formal handoff by research team.
Port ACS Lite MIB to ASC/3.
Find early adopter opportunities for further field testing/experience and evaluation.