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VTM calculation

Margarita Martínez Díaz
Civil Engineering School
VTM calculation was posted on October 24th, 2013 at 7:07 AM EDT

In the proposed chapter 36, example 1, appears a value of VTM for a facility equal to 71,501. I don´t know how I can calculate it. I have used the formula of chapter 15 but I don´t obtain the same result. ¿Could anyone help me? Thanks in advance

Paul Ryus
Kittelson & Associates, Inc.
RE: VTM calculation was posted on October 24th, 2013 at 7:59 AM EDT

VMT for a segment during one analysis period = (15-minute volume * segment length in miles). For the facility for the entire study period, total VMT is the sum of all the individual VMTs by segment and analysis period. Keep in mind that the example presents demand flow rates for each analysis period (expressed in vehicles per hour), which will need to be divided by 4 to obtain 15-minute volumes. 1 mile = 5,280 feet.

Margarita Martínez Díaz
Civil Engineering School
RE: VTM calculation was posted on October 24th, 2013 at 1:26 PM EDT

Thank you very much. I don´t still obtain the exact number, but a very good aproximation (71,311). I think that it depends on the variations that on and off-ramps cause to "my" segments.

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