Green Light Optimal Speed Advisory
An application that recommends speed to help a vehicle pass a signalized intersection during a green phase.
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The problem
Why GLOSA exists
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Operating model
How GLOSA works
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Green Light Optimal Speed Advisory combines signal timing, intersection geometry, vehicle position, and movement data to calculate an appropriate approach speed. It can reduce unnecessary stopping and support smoother traffic, but recommendations must respect speed limits, traffic conditions, prediction uncertainty, and driver or automated-system authority.
Documented activity
Real-world applications
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Supporting database
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