Estimating the Value of Truck Travel Time Reliability (2019) / Chapter Skim
Currently Skimming:
Pages 60-67
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 60... ...
60 The Reliability Valuation Framework was used to study truck travel along a freeway corridor in downtown Austin, Texas. This chapter first describes the existing traffic conditions in economic terms, estimating the user costs resulting from recurring congestion and unreliability to identify bottlenecks that caused disproportionally high costs to the movement of freight.
|
From page 61... ...
Case Study 61 The calculations described in Table 6-1 were implemented for the 75 segments that make up the I-35 corridor. The results for southbound travel are summarized in Figure 6-1 and the results for northbound travel are summarized in Figure 6-2.
|
From page 62... ...
62 Estimating the Value of Truck Travel Time Reliability Figure 6-1. User costs traveling southbound.
|
From page 63... ...
Case Study 63 found to increase dramatically between Mileposts 235 and 232, with unreliability representing 60–70 percent of these costs. The share of user costs due to unreliability increased from 35 percent at the north end of the corridor to more than 70 percent at the south end.
|
From page 64... ...
64 Estimating the Value of Truck Travel Time Reliability The approach described in Section 5.3.2.1 was used to model changes in reliability as a function of changes in average travel time. In this approach, the mean Travel Time Index is defined as where t– is the average travel time and tf is the free-flow travel time.
|
From page 65... ...
Case Study 65 Tools (L38) in Maryland.
|
From page 66... ...
66 Estimating the Value of Truck Travel Time Reliability 0 5 10 15 20 25 30 35 0 5 10 15 20 T ra ve l T im e (m in )
|
From page 67... ...
Case Study 67 Overall, it was found that if reliability is not considered in the analysis -- the approach preferred by analysts at the moment -- the benefits to freight users from the hypothetical project would be estimated at $6.0 million per year (assuming 260 workdays in the year and combining both directions of travel)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.