The effect of roadway intersection design is strictly linked to a reduction in traffic congestion, fuel consumption and emissions an urban area. This paper presents comparative result the typical four-legged roundabout operational performance for effective management. Accordingly, computer model estimation two kinds intersections created. study detailed analysis modelling flow using PTV vissim ...

R ese:irch for this article was prompted by a serious accident that occurred aiter a tripped conflict monitor c:iused an intersection signal to flash yellow for main street traffic and flash red for cross street traffic, just as the Manual on Uniform Truffic Control Devices suggests is normal. A visit to the accident site made it clear that accidents were quite foreseeable at this location if t...

Optimally minimizing delay times at signalized intersections can significantly improve both traffic flow and safety. However, most traffic flow optimizing tools do not measure the effect on safety. This study uses nonlinear programming (NLP) algorithms to optimally minimize delay times and employs both Safety performance functions (SPFs) and empirical Bayes (EB) before-after methodology to meas...

This paper proposes a robust optimal eco-driving control strategy considering multiple signalized intersections with uncertain traffic signal timing. A spatial vehicle velocity profile optimization formulation is developed to minimize the global fuel consumption, with driving time as one state variable. We introduce the concept of effective red-light duration (ERD), formulated as a random varia...

The yellow signal driver behavior, reflecting the dilemma zone behavior, is analyzed using naturalistic data from digital enforcement cameras. The key variable in the analysis is the entrance time after the yellow onset, and its distribution. This distribution can assist in determining two critical outcomes: the safety outcome related to red-light-running angle accidents, and the efficiency out...