HomeMy WebLinkAboutFOOTHILLS MALL REDEVELOPMENT - FDP - FDP130019 - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDY (3)January 23, 2013
Mr. Bryan McFarland
Principal – Development
Walton Foothills Holdings VI, LLC
5750 DTC Parkway, Suite 210
Greenwood Village, CO 80111
RE: Foothills Mall Redevelopment Traffic Impact Analysis
Addendum #1
FHU Project Number 12-136-01
Dear Mr. McFarland:
This letter-report serves as an addendum to the Foothills Mall Redevelopment Traffic Impact
Analysis prepared by Felsburg Holt & Ullevig in December 2012. Recently, the City of Fort Collins
has committed to making geometric enhancements to the College Avenue (State Highway 287) /
Horsetooth Road intersection in the near future (2013-2016). These enhancements include
widening College Avenue to provide dual northbound and southbound left-turn lanes. To
determine the overall improvement to peak period delay on opening day, the short term analysis
was re-run to include the updated geometry.
Using Synchro files developed by the City of Fort Collins as a base, the operational conditions
were analyzed at the College Avenue / Horsetooth Road intersection based on procedures
documented in the Highway Capacity Manual 2010, (Transportation Research Board, Fifth Edition,
2010). The base Synchro files were adjusted to include minor adjustments to the pedestrian split
times and to incorporate protected only left-turn phasing for the northbound and southbound
movements. Protected left-turn only phasing would be required to remain consistent with dual left-
turn phasing at existing intersections along College Avenue, and to reduce the accident potential
by removing the permitted movement. Table 1 summarizes the original short term analysis
contained in the TIA and the updated analysis including the geometric enhancements.
Table 1. College Avenue / Horsetooth Road Revised Short Term Analysis Results
Alternative
Movement Level of Service Intersection
Northbound Southbound Eastbound Westbound LOS (Delay)
LT TH RT LT TH RT LT TH RT LT TH RT
Original TIA PM F D C D C A F F F F F C D (51.7)
Original TIA SAT F D C F F B F E E F C C D (53.1)
Updated Geo. PM E B A D D A E D D E E C D (42.1)
Updated Geo. SAT E D A E D B E E E F D C D (49.1)
January 23, 2013
Mr. Bryan McFarland
Page 2
The analysis shows that the proposed dual left-turn lanes would improve both the individual
movement and overall intersection delay in the short term horizon. The weekday PM peak hour
would experience the biggest overall improvement, reducing intersection delay by 20%. The
improvement to the northbound and southbound approaches would also improve operations to the
east / west movements by shifting available green time to movements operating at or over
capacity. Overall, the proposed improvements will provide additional intersection capacity to better
serve anticipated increase in peak period traffic as a result of the Foothills Mall redevelopment.
If you have any questions concerning this analysis or need additional information, please feel free
to call (303-721-1440) or email (Jeremy.Hahn@fhueng.com) anytime.
Sincerely,
FELSBURG HOLT & ULLEVIG
Jeremy Hahn, PE, PTOE
Transportation Engineer