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Table 1 Travel speeds (miles per hour, mph) used in custom-built network datasets

From: Measuring geographic access to health care: raster and network-based methods

Road type N1 N2 N3 N4 N5
Expressways 70 60 60 62 65
Ramps 25 25 25 25 20
City owned, major 35 30 30 35 30
City owned, minor 25 20 20 25 20
Private 25 25 25 25 20
Minor collectors 55 55 55 45 50
Rural arterials and major collectors 55 55 55 45 50
Rural local 45 45 45 45 40
Urban, state owned arterials and major collectors 35 35 35 35 30
Urban, county owned arterials and major collectors 45 45 45 45 40
Urban, state owned local 35 35 35 35 30
Urban, county primary local 55 55 55 45 50
Urban, county local 25 25 25 25 20