The Bikeway Plan; April 1979-County of Hawaii

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WARRANTS /CRITERIA The type and location of bikeways depend upon, in addition to the purpose for the trip and the bicyc 1 e /pedestrian space requirements, existing road and traffic conditions. Existing travel conditions on Hawaii County roadways are shown in Figures 8 and 9. The volumes of weekly bicycle travel and trip purpose., based on responses to the Bikeplan Hawaii Survey, as well as vehicular volumes and service levels of the roadways are depicted. Ideally, the bicycle path is considered the most desirable type of bikeway (Figure 10) . However, it cannot always be provided because of cost considerations and lack of sufficient road right -of -way along existing streets. Nor is 'it always necessary where traff is conditions are light. In those instances,, other alternative bikeways may be selected. The choice of bikeway type for particular streets within the County of Hawaii should follow criteria or warrants as they are sometimes called. Warrants describe the existing road and traffic conditions beyond which significant hazard is present for the cyclist or where bicycle movements disrupt the normal flow of traffic. The warrants for the County (Table 7 ) have been derived from bikeway designs and experiences of other communities throughout the United States and Europe. Although no nationwide standard has yet been accepted or found to be most effective, the warrants nevertheless provide a rationale for the selection of bikeway types. Because these warrants have yet to be field validated, a continuing monitoring program should be established to evaluate their effectiveness and safety value. TABLE 7 MINIMUM CRITERIA FOR BIKEWAY TYPE Bicycle Path minimum criteria more than 1000 Average Daily Traf fic in outside lane bicycle volume very high approximately 200 trips per day availability of space for development (shoulder, easement) 85% of automobile traffic speed greater than 40 mph Bicycle Lane minimum criteria more than 1000 Average Daily Traffic in outside lane bicycle volume high 85% of automobi le traffic speed less than 40 mph adequate outside lane dimension or shoulder space minimum road pavement width 25 feet (continued on page 2 4 ) -2 0-