Transcription of The Gravity Model - princeton.edu
{{id}} {{{paragraph}}}
Example: biology
The Gravity Model - princeton.edu
The Gravity [10/6/2008 12:35:45 PM]The Gravity ModelThe Gravity Model is much like Newton's theory of Gravity . Thegravity Model assumes that the trips produced at an origin andattracted to a destination are directly proportional to the total tripproductions at the origin and the total attractions at the calibrating term or "friction factor" (F) represents thereluctance or impedance of persons to make trips of variousduration or distances. The general friction factor indicates that astravel times increase, travelers are increasingly less likely to maketrips of such lengths. Calibration of the Gravity Model involvesadjusting the friction socioeconomic adjustment factor is an adjustment factor forindividual trip interchanges. An important consideration indeveloping the Gravity Model is "balancing" productions andattractions. Balancing means that the total productions andattractions for a study area are form of Gravity modelWhere:Tij = trips produced at I and attracted at jPi = total trip production at IAj = total trip attraction at jF ij = a calibration term for interchange ij, (friction factor) or traveltime factor ( F ij =C/tijn )C= calibration factor for the friction factorKij = a socioeconomic adjustment factor for interchange iji = origin zonen = number of zonesBefore the Gravity Model can be used for prediction of future t
The gravity model is much like Newton's theory of gravity. The gravity model assumes that the trips produced at an origin and attracted to a destination are directly proportional to the total trip productions at the origin and the total attractions at the destination.
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: