"Table 13. Speed Trend Characteristics 1, FY 1976-1991" HIGHWAY CATEGORIES 1976 1978 1980 1982 1984 1986 1988 1990 1991 AVERAGE SPEED Urban Interstate 56.1 56.7 55.4 56.3 57.2 57.4 58.6 58.6 58.8 Urban Other Freeways & Expressways - - - 56.0 56.6 56.7 57.5 57.6 58.0 Urban Other Principal & Minor Arterials - - - 51.5 52.9 53.5 53.9 54.1 54.0 Rural Interstate 58.2 58.8 57.5 59.0 59.3 59.7 59.5 60.4 59.9 Rural Other Principal & Minor Arterials - - - 54.3 54.9 55.3 56.0 56.4 56.4 Rural Major Collectors - - - 51.6 52.1 52.9 53.6 54.3 54.3 MEDIAN SPEED (MPH)2 Urban Interstate 56.1 56.5 - 56.4 57.3 57.7 58.7 58.7 58.8 Urban Other Freeways & Expressways - - - 56.2 56.7 56.8 57.7 57.7 58.0 Urban Other Principal & Minor Arterials - - - 51.7 53.0 53.5 54.4 54.1 53.9 Rural Interstate 57.9 58.6 - 58.9 59.2 59.7 59.6 60.2 59.4 Urban Other Principal & Minor Arterials - - - 54.4 55.0 55.3 56.2 56.4 56.3 Rural Major Collectors - - - 51.8 52.3 52.9 54.0 54.6 54.5 85TH PERCENTILE (MPH)3 Urban Interstate 60.9 61.4 60.1 62.7 63.7 64.3 65.6 65.8 66.1 Urban Other Freeways & Expressways - - - 62.1 63.0 63.2 64.2 64.6 64.9 Urban Other Principal & Minor Arterials - - - 58.6 59.3 60.1 60.7 61.1 60.8 Rural Interstate 61.8 63.7 62.1 65.1 65.6 66.2 66.4 67.6 67.2 Urban Other Principal & Minor Arterials - - - 61.1 61.5 62.2 62.8 63.2 63.1 Rural Major Collectors - - - 59.4 59.8 60.6 61.4 62.0 62.1 PERCENT EXCEEDING 55 MPH Urban Interstate 57.0 60.0 51.2 58.4 63.3 64.8 69.7 69.8 69.8 Urban Other Freeways & Expressways - - - 53.8 59.0 59.6 64.7 65.0 66.5 Urban Other Principal & Minor Arterials - - - 32.4 37.6 40.7 42.6 43.6 42.2 Rural Interstate 69.0 74.0 65.9 73.1 75.1 76.2 74.0 77.6 75.5 Rural Other Principal & Minor Arterials - - - 46.2 49.8 52.4 54.9 56.3 56.5 Rural Major Collectors - - - 34.8 35.6 40.9 42.8 45.4 46.7 PERCENT EXCEEDING 60 MPH Urban Interstate 20.0 23.0 15.6 25.2 30.7 33.5 39.9 40.7 41.4 Urban Other Freeways & Expressways - - - 23.2 27.4 28.8 33.0 34.2 35.3 Urban Other Principal & Minor Arterials - - - 11.6 13.2 15.8 17.5 18.8 18.2 Rural Interstate 32.0 36.0 25.3 39.6 43.4 45.5 45.5 50.4 47.6 Rural Other Principal & Minor Arterials - - - 19.1 20.4 22.5 24.9 27.1 26.8 Rural Major Collectors - - - 14.8 14.8 17.5 18.4 20.7 21.7 PERCENT EXCEEDING 65 MPH Urban Interstate 5.0 5.0 3.2 7.4 9.9 12.0 15.9 17.1 18.0 Urban Other Freeways & Expressways - - - 6.3 8.3 9.1 11.1 12.0 12.5 Urban Other Principal & Minor Arterials - - - 3.5 3.2 4.4 5.0 5.8 5.7 Rural Interstate 10.0 10.0 6.5 13.9 16.0 18.2 18.8 23.2 20.9 Rural Other Principal & Minor Arterials - - - 6.2 6.4 7.3 8.5 9.6 9.2 Rural Major Collectors - - - 5.6 5.3 6.3 6.6 7.4 7.9