Freeways represent the best example of an unconstrained traffic flow system with high speed operations, limited access and egress opportunities and few factors to inhibit traffic flow. This road type can typically achieve the highest throughput of traffic per hour per lane across most metropolitan networks. As most regular limitations to free flow traffic conditions are removed from freeways, t...

Traffic congestion usually occurs at freeway merges due to the inequality of lane numbers upstream and downstream. The entry, defined as on-ramp, is main cause this irregularity in order clarify its effect, three are investigated study with macroscopic flow parameters where a variety geometric properties present. In each merge, when capacity achieved downstream, on-ramp flows determined relatio...

A new coordinated, traffic-responsive ramp metering algorithm has been designed for Minnes ota's freeways based on density measurements, rather than flows. This is m otivated in view of recent research indicating that the critical value of density at which capacity is observed is less sensitive and more stable than the value of capacity, thereby resulting in more effective control. Firstly , we...

The Influence of Structural Setting and Lithology on Landslide Type Pattern in Qazvin-Rasht Freeway

We describe the algorithms we have developed to automatically generate street networks and building plots in the automatic procedural creation of a realistic city. Our system first sites the important regions of a city, such as the commercial center, historical center, and residential areas. Then, a network of freeway and main roads are built. Finally, a network of streets are built throughout ...

Intelligent speed adaptation (ISA) has been shown to be an effective measure for road safety improvement. Recently, there has been an increasing interest in using ISA systems, particularly with the dynamic speed control, to manage congestion and reduce energy/emissions. The effectiveness of the dynamic ISA system relies on its speed control strategies. This paper presents the development of a p...