Analytical Formulation of the Trip Travel Time Distribution

The value of travel time variability with trip chains, flexible scheduling and correlated travel times

This paper extends the analysis of the value of mean travel time (VMTT) and day-to-day travel time variability (VTTV) from single, isolated trips to daily trip chains, considering the effects of flexibility in activity scheduling and within-day correlation of travel times. Using a multi-stage stochastic programming approach, we show that the VMTT and VTTV on a trip is conditional on the realize...

3d Stochastic Formulation for Travel Time Moments

Field data available to petroleum engineers can be sparse because they are generally obtained through discrete well locations. Therefore there is uncertainty in the knowledge of the reservoir’s physical properties such as the porosity or the permeability. In order to quantify the uncertainty in the predictions we are making for production quantities, what has traditionally been done is Monte Ca...

Investigating the distribution of the value of travel time savings

The distribution of the value of travel time savings (VTTS) is investigated employing nonparametric techniques on a large, high quality data set. When background variables are not included in the model it is found that the right tail of the distribution is not observed and hence the mean VTTS cannot be evaluated. This conclusion changes when background variables are introduced into a semiparame...

Estimating Through Trip Travel without External Surveys

Since through trips can be a significant portion of travel in a study area, estimating them is an important part of travel demand modeling. In the past, through trips have often been estimated using external surveys. Recently, external surveys were suspended in Texas, so Texas transportation planners need a way to estimate through trips without using external surveys. Previous research has focu...

The Economics of Trip Scheduling, Travel Time Variability and Traffic Information