Description You might want to think about Nestor next time you have to decide whether to slam on the breaks or try to beat the red light. Through its Nestor Traffic Systems subsidiary, Nestor makes video-based systems used to monitor traffic safety and automate red light enforcement at intersections. Its products use image processing technology to predict when a driver is going to run a red light, signal to keep cross-traffic stopped a little longer to prevent an accident, then issue a citation for the offender. Nestor, which sells its systems to state and local governments in the US, offers installation and support services. Investment firm Silver Star Partners owns 69% of Nestor.