COMPLIANCE INFO_FINAL INITIAL STUDY/MITIGATED NEGATIVE DECLARATION 5/25

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Mr. Rob Carnachan Page 3 March 6, 2025 The reported collisions along the roadway segment of East Harney Lane between SR-99 and SR-88 included 18 broadside, six head-on, six hit-object, three sideswipe, three rear-end, three other/unknown, two vehicle- pedestrian and one overturned vehicle. The three most common primary collision factors included right-of-way violations for 16 collisions, improper turning leading to seven collisions, and speeding with six crashes. The most common location for right-of-way violations was Harney Lane/Beckman Road. Similar to East Harney Lane/Clements Road, this location is not identified as a priority intersection in the LRSP; however, various techniques such as oversized stop signs and other visual enhancements may reduce this collision type. Pedestrian Safety The collision history for the study area was reviewed to determine any trends or patterns that may indicate a safety issue for pedestrians. Collision records available from the California Highway Patrol as published in their Statewide Integrated Traffic Records System (SWITRS) reports were reviewed for the most current five-year period available, which was July 1, 2019, through June 30, 2024, at the time of the analysis. During the five-year study period there were no reported collisions involving pedestrians on East Harney Lane within a mile of the project site. Bicyclist Safety Collision records for the study area were reviewed to determine if there had been any bicyclist-involved crashes. There were no bicyclist-involved collisions reported on East Harney Lane within a mile of the project site during the study period. Project Trip Generation and Distribution Trip Generation The anticipated trip generation for the proposed project was estimated based on existing vehicle counts into and out of the project site, as well as the projected increase in permitted visitors (i.e., landfill customers including private citizens and contractors), full-time employees and haul trucks. The permitted number of visitors would increase from 850 to 1200, an increase of 41 percent. For employees, the current 35 full-time employees would increase to 41, or 17 percent. For haul trucks, the count would increase from 58 movements per day to 109, or an 88-percent increase. Because the site is currently occupied by the existing North County Landfill, trip generation of the existing landfill was considered. During the 24-hour data collection period, there were 872 visitor vehicle entries and exits from the site, including 76 during the a.m. peak hour and 20 during the p.m. peak hour. As site traffic activity is predominantly associated with visitors, increasing the overall site traffic by 41 percent (the permitted increase in visitors) would net an additional 361 daily trips, including 31 trips during the a.m. peak hour and 8 trips during the p.m. peak hour. For employees, given that the proposed increase of 17 percent is lower than the visitor increase of 41 percent and the existing site traffic counts include employees as well, it would appear to be conservative to consider the 41- percent increase in site activity to include employees. Haul trucks were considered separately even though some haul truck trips would be captured in the 41-percent site activity increase. There would be 51 added haul trucks per day, for 102 new daily trips (one trip in and one trip out per haul truck). The ratio of a.m. peak hour trips to daily trips is nine percent, which would translate to nine new haul truck trips during the a.m. peak hour with five trips in and four trips out assuming an approximately even split between inbound and outbound. During the p.m. peak hour, there were 20 outbound movements and zero inbound. Given this is only two percent of the daily total volume with no inbound traffic, zero added haul trucks were assumed during the p.m. peak hour. The proposed project is expected to generate an average of 461 new trips per day (359 visitor and employee trips and 102 haul truck trips), including 40 trips during the a.m. peak hour (31 visitor and employee trips and nine haul truck trips) and eight visitor and employee trips during the p.m. peak hour (no haul truck trips) as indicated in Table 3. These new trips represent the increase in traffic associated with the project compared to existing volumes.