Median Treatments Segments of a corridor with sufficient cross access, backdoor access, and on-site circulation may be candidates for median treatments. A median divided roadway improves traffic flow, reduces congestion, and increases traffic safety — all important goals of access management. While medians restrict some left- turn movements, overall traffic delays are reduced by removing conflicting vehicle movements from the corridor. Landscaping and gateway features incorporated into median treatments improve the aesthetics of the corridor, in turn encouraging investment in the area and contributing to the overall quality of the surrounding environment. Median treatments include the following:
Access Management Techniques
Directional Crossover (Left-Over)
· Non-Traversable Median · Median U-Turn Treatment · Directional Cross (Left-Over Crossing) · Left-Turn Storage Bays · Offset Left-Turn Treatment Intersection and Minor Street Treatments
Intersection and Driveway Curb Radii
The operation of signalized intersections can be improved by reducing driver confusion, establishing proper curb radii, and ensuring adequate laneage of minor street approaches. Intersection and minor street treatments include the following: · Skip Marks (Dotted Line Markings) · Intersection and Driveway Curb Radii · Minor Street Approach Improvements Intelligent Transportation Systems Intelligent Transportation Systems (ITS) have many potential benefits when implemented in concert with an overall transportation management strategy. ITS solutions use communications and computer technology to manage traffic flow in an effort to reduce crashes, mitigate environmental impacts such as fuel consumption and emissions, and reduce congestion from normal and unexpected delays. Successful systems include a variety of solutions that provide surveillance capabilities, remote control of signal systems components, seamless sharing of traveler information with the public, and even allowances for emergency vehicles to have priority to proceed safely through signalized intersections. Several of these solutions have been implemented throughout the study area. Intelligent Transportation Systems include the following: · Signalization · Progression-Controlled Signal System
Dynamic Message Sign
Emergency Vehicle Preemption
· Dynamic Message Signs (DMS) · Emergency Vehicle Preemption · Transit Vehicle Preemption
Chapter 3: Roadway Element | page 3-5
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