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Q-WARN: Key Deployments & Studies
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•Illinois State Toll Highway Authority:
•Adaptive Queue Warning
•Spillback detection for exit ramps and mainline
•Static sign-mounted flashers
•Tunable threshold algorithms
•
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ATM and Queue Warning
•Integrated with VSL speed harmonization effort
•Estimated 15% reduction in rear-end collisions (or 21 in a 3-year period)
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Washington State I-405 ATM Feasibility Study: