A vehicular traffic control server includes monitoring means, tariff adjusting means in communication with the monitoring means, and notifying means in communication with the tariff adjusting means. The monitoring means is configured to monitor at least one traffic congestion parameter of a roadway having...http://www.google.ca/patents/US7818204?utm_source=gb-gplus-sharePatent US7818204 - Traffic control system with road tariff depending on the congestion level
