We have SP data on route choice for different combinations of time, cost, and level of stress.
We have three-time observations (common commuting route)
longer time (LT)
normal time (NT)
shorter time (ST)
I am trying (LT/ST≒ Travel Time Index) to find a number that can be used as an index for removing outliers. Some drivers are reporting longer travel times 12 times more than shorter times. Is that normal?