tigris (version 0.5)

primary_roads: Download a national primary roads shapefile into R

Description

From the Census Bureau: "Primary roads are generally divided, limited-access highways within the Federal interstate highway system or under state management. These highways are distinguished by the presence of interchanges and are accessible by ramps and may include some toll highways."

Usage

primary_roads(year = NULL, ...)

Arguments

year

the data year (defaults to 2015).

...

arguments to be passed to the underlying `load_tiger` function, which is not exported. Options include refresh, which specifies whether or not to re-download shapefiles (defaults to FALSE).

See Also

http://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2015/TGRSHP2015_TechDoc.pdf

Other transportation functions: primary_secondary_roads, rails, roads

Examples

## Not run: ------------------------------------
# library(tigris)
# 
# rds <- primary_roads()
# 
# plot(rds)
# 
## ---------------------------------------------