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6 <br />Attachment 2 <br />ACCESS MANAGEMENT PROGRAM <br />(To Be Applied Within Corridors And Development Zones) <br />ACCESS MANAGEMENT CONCEPTS <br />1. Driveway-Related Crashes <br />Much of access management involves managing traffic movements into and out of <br />commercial driveways. The reason for this is that driveway traffic generates a large <br />number of crashes on major roads and streets-arterials and collectors. <br />2. Driveway Spacing <br />Maintaining an adequate spacing between commercial driveways is one of the most <br />critical aspects of access management. <br />3. Driveway Density And Driveway Consolidation <br />Driveway density (the number of driveways per block or per mile) and driveway <br />consolidation are very important considerations in access management. These <br />roadway characteristics are basic issues in any access management plan or program. <br />4. Intersection Spacing And Traffic Signal Spacing <br />Although most discussions about access management focus on the management of <br />private driveways, proper spacing of roadway intersections is an equally important <br />access management issue. <br />Why is intersection spacing important? <br />The importance of intersection spacing is similar to that of driveway spacing. As the <br />number of intersections per mile increase, the opportunity for crashes increases. The <br />existence of too many intersections per mile also increases delay and congestion. On <br />the other hand, not providing an adequately dense street network forces motorists and <br />pedestrians to travel farther to their destinations. <br />5. Functional Areas Of Intersections <br />It is important to protect the functional area of an intersection from driveway access. <br />Driveways located within this area may result in higher crash rates and increased <br />congestion. <br />What is the functional area of an intersection? <br />The functional area of an intersection is that area beyond the physical intersection of <br />two roadways that comprises decision and maneuvering distance, plus any required <br />vehicle storage length. The functional area includes the length of road upstream from <br />an oncoming intersection needed by motorists to perceive the intersection and begin <br />maneuvers to negotiate it. The upstream area consists of distance for travel during a <br />perception-reaction time, travel for maneuvering and deceleration, and queue storage. <br />The functional area also includes the length of road downstream from the intersection <br />needed to reduce conflicts between through traffic and vehicles entering and exiting a <br />property. <br />