MINUTES OF ID TEAM MEETING
August 25, 1986
Stan Nuffer, CH2M HILL
Duncan Silver, FHWA
Fred LaBar, USFS
Steve Flint, Audobon Society
Jack Spence, Sierra Club
Cliff Forsgren, CH2M HILL
Gale Larson, Valley Engineering
John Neil, UDOT
Jim Naegle, UDOT
Lynn Zollinger, UDOT
Rudy Lukez, Cache Group Sierra Club
Howard Richardson, UDOT
Todd Weston, UDOT
Item 1 - Review of Minutes
Duncan Silver suggested that there be no more discussion on
roadway maintenance and that the tech memo be written so
that the team could go on to other items. Lynn Zollinger
indicated that the material placed along the river was not
bladed into the river but rather bladed to the side to
establish a roadway shoulder.
There was no other discussion on the minutes.
Item 2 - Draft Traffic Forecast Technical Memorandum
Steve Flint presented written comments on the draft memorandum
and a copy was presented to each team member present.
Jack Spence indicated that he had tried several methods to
, try and establish a trend using annual and non-summer ADT's
and found that the scatter of the points was too great to
draw any conclusions. From a statistical standpoint a correlation
was not found. However, given the data available,
he could not recommend an approach which would be any better
than those described in the memo.
Duncan Silver felt that the methodology used was adequate
and that the written comments received should be incorporated
into the memo and this portion of the study concluded. There
was agreement on use of the 2 percent compounded growth for
making traffic projections.
There was some discussion on how and when the design hour
volume would be e?tablished. Cliff Forsgren explained that
it was planned to select the design hour volume as part of
the capacity evaluation. The 100 highest hour volumes for
several of the past years are being plotted and will be available_
by the next meeting.-- The design hour volume will be
determined at that time.
Item 3 - Review of Manual Traffic Counts
Stan Nuffer reviewed the manual traffic count data. The
manual counts have been completed and the data will now be
reduced. Duncan Silver asked how a traffic profile would be
developed through the Canyon. Stan explained that the data
from the permanent station and the manual counts would be
correlated to establish a profile and directional split
through the Canyon. Stan pointed out that the hourly directional
split appears to follow an urban distribution.
Item 4 - Review of Existing Roadway Features
Stan Nuffer distributed illustrations of typical road crosssections
at mile posts through the Canyon and explained that
this information would be used to establish capacity and
level of service.
The discussion focused primarily on the design speed and how
and when it would be established. Stan Nuffer indicated
that it would be desirable to keep the speed as uniform as
possible through the Canyon, but that may not be possible.
It was explained that the design speed is usually a function
of lane width and horizontal and vertical alignment.
Lynn Zollinger asked when the alternate routes from the Summit
to Garden City would be considered.- Stan Nuffer explained
that it would occur during the alternative development task
which was yet to come. The 1 inch = 500 feet mapping will
not be available until mid September.
Jack Spence expressed some concern ab6ut whether or not
there would be enough information available to hold the
first public involvement meeting in early September. It was
decided that since the first meeting had not been officially
scheduled to wait until the information was available to
schedule the public involvement meeting.
The next ID Team meeting will held in Brigham City.
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