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Analysis Hour Characeristics

Gustavo Riente de Andrade
TECTRAN - T├ęcnicos em Transportes ltda
Analysis Hour Characeristics was posted on April 29th, 2011 at 2:08 PM EDT
regarding Chapter 3: Modal Characteristics

It is great that we HCM Users now have a discussion forum so we can share our parctices around the world. With respect to the analysis hour, I'd like to know from other users: which traffic stream characteristics (mainly PT and PHF) do you use in your studies, under an operatioal level of analysis; the exact values found for the analysis hour (if datailed data is available) or an annual average for the section?

Watts A/E
Watts Architecture and Engineering, P.C.
RE: Analysis Hour Characeristics was posted on May 9th, 2011 at 4:05 PM EDT

We will use the values determined from the peak hour analysis.

Gustavo Riente de Andrade
TECTRAN - T├ęcnicos em Transportes ltda
RE: Analysis Hour Characeristics was posted on May 11th, 2011 at 4:14 PM EDT

That sounds more appropriate to me. In Brazil, we have normaly high percent of trucks in tne traffic stream. However, this proportion tends to decrease during the peak hours, when automobiles compose most of the stream. If we use annual average percent of trucks and the peak hour total volume, I am afraid we may be underestimating the actual level of service at the analysis hour.

Eric Wrage
Bohannan Huston, Inc.
RE: Analysis Hour Characeristics was posted on August 4th, 2011 at 3:24 PM EDT

We use both percent trucks and PHF.

Fadi Nassar
ATEC
RE: Analysis Hour Characeristics was posted on August 16th, 2011 at 3:29 AM EDT

We adjust for both PT and PHF. However in congested areas during peak hours, PHF is 0.95 or higher.

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