City of Hermosa Beach --- 05-12-98


SUBJECT: 6TH ST. TRAFFIC STUDY -PACIFIC COAST HIGHWAY TO ARDMORE AVENUE


Recommendation:

That the City Council direct staff as deemed appropriate.


Background:

On February 10, 1998, the City Council directed staff to proceed with a traffic study to limit 6th Street traffic in the block between Ardmore Avenue and Pacific Coast Highway, by closing 6th Street to westbound traffic west of the commercial zone. Linscott, Law & Greenspan (LL & G) prepared the attached traffic study


Analysis:

The study area included 6th Street between Ardmore Avenue and Pacific Coast Highway and adjacent residential streets ( 8th, 6th, 5th and 2nd Streets). The existing and proposed conditions were examined using the Intersection Capacity Utilization (ICU) method of analysis and the incremental daily traffic increase methodology developed by the Los Angeles Department of Transportation to determine:

  1. The volume to capacity (v/c) ratio and level of service (LOS) of 8th, 5th and 2nd Street intersections1
  2. The percentage of redistribution of traffic expected with reconfiguration of 6th Street2


Conclusions of Study:

The proposed reconfiguration of 6th Street (closing 6th Street to west bound traffic west of the commercial zone) results in the following traffic impacts3:

  • 17.9% increase to daily traffic added to 6th St. east of Ardmore Ave. (1,203 vehicles to 1,418 vehicles) & 13.1% decrease to daily traffic added to 6th St. west of PCH (1635 vehicles to 1,420 vehicles).
  • 8th, 5th and 2nd Streets west of PCH increased traffic added respectively with 4.4%, 14.9% and 4.3%
  • AM/PM peak V/C and LOS not significantly impacted at signalized 8th, 5th 2nd /PCH intersection
  • Ardmore at 6th Street unsignalized intersection is not significantly impacted.
  • Ardmore north of 6th St. and south of 6th Street increased traffic respectively with 5.0% and 13.6%
  • Ardmore north of 2nd St. impacted with 8% traffic volume increase.


Notes

  1. Volume capacity (v/c) is the ratio of the volume of traffic to the capacity of the roadway. Level of Service (LOS) is the standard used for the amount of traffic delay over a 24 hour period for an intersection. A % increase in VC or drop below LOS D Level is generally considered a significant impact.
  2. L.A. DOT methodology used to assess the percent of redistributed traffic expected to increase on surrounding streets
  3. Table I - Traffic Study


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