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Ada County Highway District • 3775 Adams Street • Garden City, ID • 83714 • PH 208-387-6100 • FX 345-7650 • www.achd.ada.id.us
Kent Goldthorpe, President
Paul Woods, Vice President
Rebecca W. Arnold, Commissioner
Sara M. Baker, Commissioner
Jim D. Hansen, Commissioner
Committed to Service
April 26, 2016
John Dorney
Horrocks Engineers
5700 E. Franklin Road, STE 160
Nampa, ID 83687
Subject: St. Ignatius Elementary School Traffic Impact Study
The Ada County Highway District (ACHD) staff has completed an initial review of the submitted
traffic impact study for St. Ignatius Elementary School. Below are the comments/recommendations
that will be required to be addressed prior to the District proceeding with its review of the
development application.
1. The intersection capacity analysis shown in in the study did not include the intersection level
of service by lane group. The study should be revised to provide this information and
resubmitted to staff for review.
2. The existing conditions analysis did not review crash history, as required by District policy
7106.8.3. Please provide a crash analysis for the intersections and roadway segment
included in the study for staff’s review.
3. Staff questions the traffic volumes shown on Figure 17. How is the traffic volume only
increasing by approximately 10 vehicles on Meridian Road in the AM peak hour? Please
review and submit any modifications to staff for review.
4. The proposed driveway on Meridian Road does not currently have a left turn lane or center
land lane as stated on page 29 of the study. Please provide the left turn lane analysis and
submit the information to staff for review.
5. It is unclear to staff how the proposed student drop-off/pick-up area is going to work. Is the
length of the drop-off adequate for the proposed queues? Do pedestrians have to cross the
drop-off/pick-up area? Is there adequate parking/stacking during pick-up?
6. Figure 14 on page 23 shows a gap in the sidewalk (across an out parcel) on Meridian Road.
It would be beneficial to have a sidewalk constructed across the out parcel; it appears that
the out parcel is owned by the applicant.
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Ada County Highway District • 3775 Adams Street • Garden City, ID • 83714 • PH 208-387-6100 • FX 345-7650 • www.achd.ada.id.us
Please let me know if you have any questions.
Sincerely,
Mindy Wallace, AICP
Planner III
Development Services
CC: City of Meridian – Bill Parsons
The Land Group – Tamara Thompson