HomeMy WebLinkAbout5/7/2019 Item 15, Grigsby1
Wheeler, Bryan
From:Streder, Melissa@DOT <melissa.streder@dot.ca.gov>
Sent:Monday, September 18, 2017 3:11 PM
To:Wheeler, Bryan
Cc:Cohen, Rachel; Hudson, Jake; Boyle, Frank@DOT; Persons, Terri@DOT
Subject:650 Broad Street Trip Generation
Attachments:TankFarm_SanteFeToBroad.pdf; Broad_IndustrialToTankFarm.pdf; 227 count data.pdf; 227 count
data.pdf
Hi Bryan,
Thank you for your call regarding trip generation assumptions proposed for the 650 Broad Street projects.
After review of the peak hour data you provided, we stand behind our recommendation that at the very least the 8:00
am peak hour and the PM peak hour be analyzed. Perhaps the midday peak could be evaluated as well. The costs should
be negligible considering that the majority of the intersection analyses work is setting up the intersection’s variables.
From the attached data, it looks like for Broad between Industrial Way and Tank Farm, the AM peak appears to occur at
8:00 AM (Day 1: 298 NB and 307 SB and Day 2: 308 NB and 279 SB) and on Tank Farm between Santa Fe and Broad (Day
1: 249 EB and 212 WB and Day 2: 189 EB and 176 WB). Please let me know if this is your understanding as well. This
interpretation appears to be flip flopped from your previous email discussing peak hour and I want to make sure we are
understanding this right.
Broad also serves as an arterial while Tank Farm functions as a collector, so we believe that it is more important to base
the am peak hour time frame on Broad (8:00 AM) if it is not possible to evaluate both the 8:00 am and the 11:00 am in
addition to the pm peak. Also, the traffic count data that we have at Creston Rd/227 shows that the peak hour is at 7‐9
and 2‐6 everyday day during the week (see attached). Only on weekends do the peak hours largely shift to 11‐12 and 12‐
2. These are 24 hour counts that span two months. This information may influence your decision as well.
Anyway, these are our recommendations. Please feel free to email or call if you have any additional questions.
Best Regards,
Melissa Streder
Associate Transportation Planner
California Department of Transportation
(805) 549‐3800
(Mon‐Thurs)