Nonstandard Design Features. The project proposes to maintain the existing nonstandard features. The approval date for the Existing Features to Remain: Memo to File is August 23, 2020. The details of the nonstandard features to remain are discussed below. The existing posted speed for the corridor is 65 miles per hour (mph), and the project will maintain this existing speed. The design speed for freeways in urban areas varies from 55 mph to 80 mph. The design speed for the project is 70 mph. The existing horizontal and vertical curves along I-80 within the project limits provide stopping sight distances that vary from 311 feet to greater than 750 feet (40 mph to 70 mph), and the project will maintain the existing vertical curve sight distances. Nonstandard median widths of 6 feet to 12 feet are proposed between “WB3” Station (Sta.) 296+00 and “WB6” Sta. 1125+00, where the project conforms to existing conditions. Table 5-1 lists the existing and proposed median widths within the project limits. P12 to P27 "WB4" 548+00 to "WB5" 756+00 6 6 P30 to P41 "WB5" 791+00 to "AM4" 954+00 6 6 P41 to P54 "AM4" 954+00 to "WB6" 1122+00 12 12 * “Page Number” refers to the layout page number; see Attachment C.
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Sources: Project Baseline Agreement, Project Baseline Agreement