Ordinances-2003-260

composition and number of turning vehicles likely to arrive in an average 2-min. period within the peak hour. As a minimum requirement, a 200-foot storage space shall be used. At signalized intersections the required storage length depends on the signal cycle length, the signal phasing arrangement, and the rate of arrivals and departures of left-turning vehicles. The storage length should usually be based on two times the average number of vehicles that would store per cycle, which is predicated on the design volume. This length will be sufficient to serve heavy surges that occur from time to time. Both types of intersections are subject to IDOT regulations. 5. Drainage Consideration Special care must be addressed to surface drainage in the vicinity of channelizing islands; surface runoff must not be impeded on the roadway or driveway throat. 6. Island Visibility Channelizing islands shall be highly visible by both day and night. The curbing of raised islands and medians dividers should be painted with beaded paint. Raised reflectorized markers, object markers, and warning or regulatory signs may be required to aid in visibility and traffic channelization. There should also be natural color contrast between the pavement and the island. 7. Regulatory Signing for Islands Regulatory signing and/or pavement markings must be used along with channelizing islands to effectively and legally prohibit particular access movements. Signage will be provided by permittee. iv. Gaps Between Widening Improvements