Patent ID: 8917190

Claim:
A method of controlling traffic at an at grade intersection of a first street and a second street each with at least one lane of vehicle traffic in each direction, wherein a first vehicle traveling in a first direction on said first street desiring to turn on to said second street could potentially impede the progress, based on traffic conditions, of a second vehicle behind said first vehicle also traveling in said first direction on said first street that does not desire to turn onto said second street, said method comprising the step of: establishing a policy restricting turns at said intersection based on current traffic conditions wherein said policy permits said first vehicle to turn onto said second street if doing so would not substantially impede the progress of said second vehicle, and wherein said policy prohibits said first vehicle from turning onto said second street if doing so would substantially impede the progress of said second vehicle, wherein if prohibited from turning said first vehicle must proceed through said intersection without waiting.