Abstract
 Travel Time: An Empirical Method for Determining Average Network Speeds Track: Transportation Author(s): Steven Schonhaut, James Johnston The GIS Group in Planning and Analysis at Kaiser Permanente uses ArcInfo and the Network Analyst extension to examine the spatial relationships that exist between ZIP Code-level patient locations and clinical services throughout the California Health Care Network. This paper will discuss the use of sensor based highway speed measurements collected from loop detectors, third-party radar devices and field study methodologies to develop real and derived travel time impedance values and apply them to a statewide GIS transportation network. Kaiser has developed an empirical method to derive average drive time values where no observed data exists and thereby enhance the value of the Transportation Network. Since the drive time values are adjustable by population density and road type as well as time of day, the methods presented provide a flexible foundation upon which travel time analysis can be modeled. Steven Schonhaut Kaiser Permanente Planning & Analysis 1950 Franklin St. 11th Floor oakland , CA 94612 US Phone: 510.987.2667 E-mail: Steven.Schonhaut@kp.org James Johnston Michael Baker Jr. Inc. GIS Services 505 14th St. Suite 810 Oakland 94612 US Phone: 510.879.0952 Fax: 510.879.0968 E-mail: jjohnston@mbakercorp.com |
|||||
