1. Some traffic features at freeway bottlenecks
2. Increasing the capacity of an isolated merge by metering its on-ramp
3. DaganzoJorge. MunozLaval and Juan Carlos. (2002) "Some ideas for freeway congestion mitigation with advanced technologies" Institute of Transportation Studies2002Research Report UCB-ITS-PRR-2000-3.
4. Kwangho Kim and Cassidy Michael J. (2011) "A Capacity-Increasing Mechanism in Freeway Traffic and On-ramp Metering Strategies to Affect It". Research Report UCB-ITS-RR-2011-2.