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<br />RAISED CROSSWALKS OR SPEED TABLES <br /> <br />DESCRIPTION: A raised crosswalk is a flat-topped speed hump built as a pedestrian crossing <br />with a maximum height of 3 inches over a distance of 22 feet in the direction of travel. The <br />central1O-foot section of the table is flat. <br /> <br />. APPLICATION: They may be used singly for a raised crosswalk, or in a series of two or more <br />for the purpose of speed reduction; similar to a speed hump. The raised crosswalk should extend <br />all the way to the curb, possibly requiring new storm drainage construction, thus increasing the <br />cost considerably. The design application is similar to a speed hump. This design is appropriate <br />for heavily used crosswalks near schools and recreation facilities. Raised crosswalk and speed <br />tables are fairly effective in reducing vehicle speed similar to that of speed humps. However, due <br />to longer crossing distance, it results in less abrupt speed reduction. If an alternate travel path is <br />available, traffic diversion may occur. Raised crosswalks may be used on local residential and <br />residential collectors with average daily traffic volumes less than 4,000 vehicles. <br /> <br />LIMITATIONS: All traffic calming plans must be approved by the Alameda County Fire <br />Department. Typically, raised crosswalks may delay emergency vehicles up to 10 seconds. In <br />order to be effective in reducing vehicle speeds, it should be used in conjunction with other traffic <br />calming devices. Raised crosswalk may not be used on non-residential roadways and on <br />roadways with more than 4,000 average daily trips. <br /> <br />ADVANTAGES: <br />. Effective in reducing vehicle speeds <br />. Enhances pedestrian visibility in the crosswalk <br />. Clearly designates crosswalks <br /> <br />DISADVANTAGES: <br />. Increases emergency response times <br />. May increase vehicle noise in the vicinity of the raised crosswalk or speed table <br />. May require extensive signing <br /> <br />TYPICAL COSTS: Typical costs range between $4000 and $10,000, depending upon drainage <br />issues. Annual maintenance cost is approximately $250. <br /> <br />_COON or m<mc <br /> <br />.. <br /> <br />lIP" <br /> <br />J!!" ~1fid'_&~~B'$f4"~$@'#$i%'d!t#J[@'?!0;~;~.__ ROAD SIJI1r'C[ <br />I... 22' .1 <br /> <br />SPEED TABL[ <br /> <br />City of San Leandro, Engineering and Transportation Page 14 of 23 <br />4/20/06 NEIGHBORHOOD TRAFFIC CALMING PROGRAM <br />