Why were the HOT lane sensors installed over the existing HOV lane and the lane next to it?
A. We installed two overhead sensors at each access point to ensure the Good to Go! computer system does not charge a toll to vehicles traveling in the general-purpose lane next to the HOT lane. When the sensors read a Good to Go! transponder, the computer system determines which lane the vehicle is traveling in by comparing signal strengths between the sensors. If the sensor over the general-purpose lane detects a stronger signal, the computer determines the vehicle is in the general-purpose lane and does not charge a toll. If the sensor over the HOT lane detects the stronger signal the vehicle is in the HOT lanes, and the system charges the toll.
