To relieve freeway congestion during peak periods, ramp metering (RM) is often
implemented to control the input flow from onramps on freeways. Many studies focus on …

Freeway congestion usually occurs in on-ramp areas; however, it also occurs around off-
ramp areas and can even spill back onto the main line, which is common on many …

This article describes a coordinated ramp metering algorithm for systematically mitigating
freeway congestion. A preemptive hierarchical control scheme with a three‐priority‐layer …

Ramp metering (RM) dynamically adjusts ramp flow merging into freeway mainline
according to real-time traffic conditions to improve traffic operation. The effectiveness of RM …

Freeway ramp metering is an efficient freeway control that can ameliorate freeway
congestion by limiting the number of vehicles entering the freeway. This study presents …

Based on the analysis of urban freeway on-ramp control, an on-ramp model is developed
and simulated via the microscopic transportation simulation software PARAMICS using three …

This paper develops a model-based hierarchical control method for coordinated ramp
metering on freeway networks with multiple bottlenecks and on-and off-ramps. The controller …

Ramp metering has been broadly accepted and deployed as an effective countermeasure
against both recurrent and non-recurrent congestion on freeways. However, many current …

To prevent local streets being blocked by overflowing on-ramp queues, a standard practice
of ramp metering control is to restrain its function when a series of preset conditions are …

A new traffic-responsive feedback control strategy, heuristic ramp-metering coordination
(HERO) that coordinates local ramp-metering actions in freeway networks is presented. The …