Appendix H - Transportation Supporting Information COMBINED

Transportation Impact Study for Hidden Canyon Residences & Preserve March 2023 Page | 13 LOS ratings for stop-sign controlled intersections are based on the average control delay expressed in seconds per vehicle. At side-street, stop-sign controlled intersections, the control delay is calculated for each movement and delay for the worst approach is recorded. For approaches composed of a single lane, the control delay is computed as the average of all movements in that lane. The weighted average delay for the entire intersections is presented for all-way stop controlled intersections. At an unsignalized intersection, most of the major street traffic is undelayed, and by definition has acceptable conditions. The major street left-turn movements and the minor street movements are all susceptible to delay of varying degrees. Generally, the higher the major street traffic volumes, the higher the delay for the minor movements. Table 2 summarizes the relationship between control delay and LOS for unsignalized intersections. The study intersections were analyzed using the 6th Edition of the Highway Capacity Manual (HCM) operations methodology using SYNCHRO 10.0 analysis software. Table 2: Level of Service Definitions for Stop-controlled Intersections Level of Service Description A Very low control delay less than 10 seconds per vehicle for each movement subject to delay. B Low control delay greater than 10 and up to 15 seconds per vehicle for each movement subject to delay. C Acceptable control delay greater than 15 and up to 25 seconds per vehicle for each movement subject to delay. D Tolerable control delay greater than 25 and up to 35 seconds per vehicle for each movement subject to delay. E Limit of tolerable control delay greater than 35 and up to 50 seconds per vehicle for each movement subject to delay. F Unacceptable control delay in excess of 50 seconds per vehicle for each movement subject to delay. Source: Highway Capacity Manual 6 ~KM