Average annual daily traffic data collected from the Minnesota Department of Transportation data base.
Usage
data(AADT)
Arguments
Format
A data frame with 121 observations on the following 8 variables.
aadt
average annual daily traffic for a section of road
ctypop
population of county
lanes
number of lanes in the section of road
width
width of the section of road (in feet)
control
a factor with levels: access control; no access control
class
a factor with levels: rural interstate; rural noninterstate; urban interstate; urban noninterstate
truck
availability situation of road section to trucks
locale
a factor with levels: rural; urban, population <= 50,000; urban, population > 50,000
References
Cheng, C. (1992). Optimal Sampling for Traffic Volume Estimation, Unpublished Ph.D. dissertation, University of Minnesota, Carlson School of Management.
Neter, J., Kutner, M.H., Nachtsheim, C.J.,Wasserman, W. (1996). Applied Linear Statistical Models (4th ed.), Irwin, page 483.