MAKING IT USEABLE
   Weighting
      Examples		      

The following table identifies the weight to use in obtaining many of the commonly calculated values.

Table 2

If you want :

Use

WEIGHT

Count of
  • Households
  • Vehicles
  • Self-reported vehicle miles traveled (VMT) per vehicle
  • Odometer-estimated VMT per vehicle
Household Weight WTHHFIN
Count of
  • Persons
  • Drivers
  • Workers
  • Self-reported VMT per driver
  • Avg. time spent driving POV per day
Person Weight WTPERFIN
Travel Day
  • Annual person miles of Travel (PMT)
  • Annual person trips (PT)
  • Annual vehicle miles of travel (VMT)
  • Annual vehicle trips (VT)
  • Avg. person trip length
  • Avg. vehicle trip length
  • Avg. person trip duration
  • Avg. vehicle trip duration
  • Avg. time spent driving POV per day
Travel Day Trip Weight WTTRDFIN
Travel Period
  • Annual person miles of Travel (PMT)
  • Annual person trips (PT)
  • Annual vehicle miles of travel (VMT)
  • Annual vehicle trips (VT)
  • Avg. one-way person trip length
  • Avg. one-wat vehicle trip length
Travel Period Trip Weight WTTRPFIN