Appendix B. Validation results
Table B1. Validation Results for Person Miles
Census Region/ Division | Urban Group | Median Census Tract Value | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Person miles | ||||||||||
Number of Tracts | Mean percent of households with NHTS data | NHTS | NHTS Est. | MAPE NHTS vs. NHTS Est. |
Percent difference NHTS est. v. NHTS | ACS Est. | MAPE NHTS vs. ACS Est. |
Percent difference ACS est. v. NHTS | ||
Northeast | Urban | 38 | 0.53 | 57.1 | 46 | 15 | -19.6 | 48.1 | 15.8 | -15.8 |
Suburban | 67 | 0.69 | 60 | 64.5 | 15.6 | 7.4 | 72.6 | 16.2 | 21 | |
Rural | 142 | 0.62 | 73.7 | 73.3 | 15.7 | -0.5 | 79.2 | 18.3 | 7.4 | |
Midwest | Urban | 24 | 0.79 | 45.6 | 59.4 | 16.4 | 30.4 | 58.5 | 14.5 | 28.5 |
Suburban | 23 | 0.8 | 44.5 | 63.5 | 20.3 | 42.5 | 66.9 | 22.3 | 50.3 | |
Rural | 30 | 0.74 | 65.3 | 90.7 | 23.4 | 39 | 91.3 | 25 | 39.8 | |
South Atlantic | Urban | 121 | 0.44 | 46.8 | 47.3 | 9.4 | 1.1 | 52.4 | 13.5 | 11.9 |
Suburban | 317 | 0.55 | 60.1 | 61.3 | 12.6 | 1.9 | 68.2 | 16.7 | 13.3 | |
Rural | 445 | 0.55 | 73.7 | 77.7 | 14.6 | 5.5 | 86.8 | 20.6 | 17.8 | |
East South Central and West South Central | Urban | 79 | 0.31 | 62.8 | 58.8 | 12.5 | -6.3 | 60.8 | 13.6 | -3.1 |
Suburban | 79 | 0.31 | 76.5 | 73.2 | 16.7 | -4.3 | 76.3 | 18.6 | -0.2 | |
Rural | 164 | 0.31 | 78.8 | 85.2 | 20.8 | 8.2 | 97.6 | 24.7 | 24 | |
Mountain | Urban | 53 | 0.39 | 44.2 | 53.5 | 15.5 | 21.2 | 52.5 | 20.1 | 19 |
Suburban | 46 | 0.45 | 56.7 | 57.4 | 11.1 | 1.1 | 65.3 | 9.6 | 15 | |
Rural | 51 | 0.32 | 64.2 | 74.8 | 19.6 | 16.5 | 90 | 23.1 | 40 | |
Pacific | Urban | 110 | 0.5 | 55.8 | 53.9 | 9.9 | -3.6 | 60.1 | 13.1 | 7.6 |
Suburban | 45 | 0.5 | 56.3 | 58.7 | 11.6 | 4.3 | 66.5 | 11.8 | 18 | |
Rural | 45 | 0.38 | 71.6 | 64.5 | 16 | -9.9 | 70.5 | 13.9 | -1.6 |
NOTE: MAPE = Median absolute percent error. Absolute percent difference between NHTS data value and predicted data value calculated for each Census tract. Median of differences for each Census region/division and urban group calculated to find the MAPE. Percent difference is the difference between the median NHTS value for each Census region/division and urban group and the median predicted value.
States included by Census Region: Northeast = NY (excluding Census tracts in Manhattan), VT; Midwest = IN, IA, NE, SD; South Atlantic = FL, GA, NC, SC, VA; East South Central and West South Central = AL, TN, TX; Mountain = AZ; Pacific = CA
Table B2. Validation Results for Person Trips
Census Region/ Division | Urban Group | Median Census Tract Value | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Person trips | ||||||||||
Number of Tracts | Mean percent of households with NHTS data | NHTS | NHTS Est. | MAPE NHTS vs. NHTS Est. |
Percent difference NHTS est. v. NHTS | ACS Est. | MAPE NHTS vs. ACS Est. |
Percent difference ACS est. v. NHTS | ||
Northeast | Urban | 38 | 0.53 | 7.8 | 7.6 | 0.6 | -2.4 | 8.5 | 1.8 | 8.4 |
Suburban | 66 | 0.7 | 8.3 | 8.3 | 1.3 | 0.6 | 9.2 | 1.5 | 11.3 | |
Rural | 143 | 0.62 | 8.4 | 8.2 | 1 | -2.3 | 9.1 | 1.6 | 8.7 | |
Midwest | Urban | 22 | 0.79 | 8.8 | 9 | 0.7 | 2.4 | 9.5 | 1.7 | 8.3 |
Suburban | 23 | 0.8 | 8.4 | 8.7 | 0.5 | 2.8 | 8.9 | 1 | 5.8 | |
Rural | 29 | 0.73 | 8.8 | 9.4 | 1.4 | 6 | 10 | 2 | 13.2 | |
South Atlantic | Urban | 118 | 0.45 | 7.4 | 7 | 1 | -4.3 | 8.5 | 1.2 | 15 |
Suburban | 319 | 0.54 | 8.2 | 7.8 | 0.9 | -4.2 | 8.9 | 1.3 | 8.7 | |
Rural | 451 | 0.55 | 7.7 | 7.6 | 1 | -1.8 | 8.7 | 1.4 | 12.7 | |
East South Central and West South Central | Urban | 79 | 0.32 | 7.9 | 8.4 | 1.1 | 6.7 | 9.6 | 1.6 | 22 |
Suburban | 79 | 0.31 | 9 | 9.1 | 1 | 1.1 | 10.5 | 1.4 | 17 | |
Rural | 166 | 0.31 | 8.1 | 8.1 | 0.9 | -0.9 | 9.9 | 1.7 | 22.4 | |
Mountain | Urban | 66 | 0.4 | 7.8 | 7.2 | 1 | -7.4 | 8.6 | 2.1 | 10.1 |
Suburban | 46 | 0.46 | 8.3 | 8.3 | 1.1 | 0.3 | 9 | 1.3 | 8.7 | |
Rural | 52 | 0.32 | 8.2 | 8.5 | 1.1 | 4.2 | 9.9 | 1.8 | 21.2 | |
Pacific | Urban | 106 | 0.5 | 8.4 | 8.1 | 1.1 | -3.5 | 9.3 | 1.7 | 11.3 |
Suburban | 47 | 0.49 | 8.9 | 8.4 | 1.1 | -6.4 | 9.9 | 1.3 | 11.1 | |
Rural | 46 | 0.39 | 8.1 | 8.6 | 1 | 5.7 | 9.7 | 1.6 | 19.6 |
NOTE: MAPE = Median absolute percent error. Absolute percent difference between NHTS data value and predicted data value calculated for each Census tract. Median of differences for each Census region/division and urban group calculated to find the MAPE. Percent difference is the difference between the median NHTS value for each Census region/division and urban group and the median predicted value.
States included by Census Region: Northeast = NY (excluding Census tracts in Manhattan), VT; Midwest = IN, IA, NE, SD; South Atlantic = FL, GA, NC, SC, VA; East South Central and West South Central = AL, TN, TX; Mountain = AZ; Pacific = CA
Table B3. Validation Results for Vehicle Miles
Census Region/ Division | Urban Group | Median Census Tract Value | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Vehicle Miles | ||||||||||
Number of Tracts | Mean percent of households with NHTS data | NHTS | NHTS Est. | MAPE NHTS vs. NHTS Est. |
Percent difference NHTS est. v. NHTS | ACS Est. | MAPE NHTS vs. ACS Est. |
Percent difference ACS est. v. NHTS | ||
Northeast | Urban | 39 | 0.54 | 29.2 | 32.8 | 7.4 | 12.3 | 32 | 8 | 9.7 |
Suburban | 65 | 0.71 | 48.1 | 50.6 | 13.3 | 5.1 | 54.3 | 10.7 | 13 | |
Rural | 142 | 0.62 | 54.9 | 55.1 | 9.4 | 0.3 | 57.7 | 12.3 | 5 | |
Midwest | Urban | 24 | 0.79 | 36.3 | 43.3 | 11 | 19.2 | 39.6 | 10.1 | 9 |
Suburban | 23 | 0.8 | 36.8 | 45.3 | 13.2 | 23 | 48.7 | 12.1 | 32.4 | |
Rural | 30 | 0.73 | 49.3 | 62.7 | 15 | 27.2 | 65.5 | 13.8 | 32.9 | |
South Atlantic | Urban | 121 | 0.44 | 35.5 | 36.1 | 7.5 | 1.7 | 38 | 8 | 7.2 |
Suburban | 317 | 0.54 | 42.7 | 46.2 | 8.9 | 8.3 | 49.3 | 11.9 | 15.4 | |
Rural | 450 | 0.55 | 53.1 | 56.3 | 10.6 | 6 | 60.5 | 13.6 | 13.8 | |
East South Central and West South Central | Urban | 78 | 0.31 | 45.6 | 44.1 | 9.7 | -3.3 | 45.1 | 10.3 | -0.9 |
Suburban | 79 | 0.31 | 54.5 | 54.1 | 10.9 | -0.7 | 56 | 11.2 | 2.8 | |
Rural | 163 | 0.31 | 57.9 | 57.9 | 11.1 | 0 | 64.3 | 14.2 | 11.2 | |
Mountain | Urban | 54 | 0.38 | 30 | 34.7 | 8.1 | 15.8 | 34 | 9.9 | 13.3 |
Suburban | 52 | 0.49 | 42.4 | 41.7 | 10.3 | -1.5 | 44.7 | 8.7 | 5.4 | |
Rural | 51 | 0.32 | 50.7 | 51.4 | 11.3 | 1.3 | 63.5 | 15.8 | 25.1 | |
Pacific | Urban | 108 | 0.5 | 38.2 | 39.3 | 7.5 | 2.7 | 42.5 | 9.3 | 11.2 |
Suburban | 45 | 0.5 | 44.9 | 43.2 | 9 | -3.8 | 49.8 | 9.4 | 10.8 | |
Rural | 47 | 0.38 | 50.2 | 46.4 | 11.5 | -7.6 | 51.2 | 13.9 | 1.9 |
NOTE: MAPE = Median absolute percent error. Absolute percent difference between NHTS data value and predicted data value calculated for each Census tract. Median of differences for each Census region/division and urban group calculated to find the MAPE. Percent difference is the difference between the median NHTS value for each Census region/division and urban group and the median predicted value.
States included by Census Region: Northeast = NY (excluding Census tracts in Manhattan), VT; Midwest = IN, IA, NE, SD; South Atlantic = FL, GA, NC, SC, VA; East South Central and West South Central = AL, TN, TX; Mountain = AZ; Pacific = CA
Table B4. Validation Results for Vehicle Trips
Census Region/ Division | Urban Group | Median Census Tract Value | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Vehicle Trips | ||||||||||
Number of Tracts | Mean percent of households with NHTS data | NHTS | NHTS Est. | MAPE NHTS vs. NHTS Est. |
Percent difference NHTS est. v. NHTS | ACS Est. | MAPE NHTS vs. ACS Est. |
Percent difference ACS est. v. NHTS | ||
Northeast | Urban | 38 | 0.53 | 4.9 | 4.8 | 0.7 | -1.2 | 4.7 | 0.7 | -3.5 |
Suburban | 66 | 0.7 | 5.8 | 5.9 | 0.9 | 2.7 | 5.9 | 1 | 1.7 | |
Rural | 143 | 0.62 | 5.7 | 5.7 | 0.6 | 0.8 | 6 | 1 | 6.2 | |
Midwest | Urban | 23 | 0.78 | 6.2 | 6.1 | 0.4 | -2.1 | 5.9 | 0.7 | -5.1 |
Suburban | 23 | 0.81 | 6.4 | 6.2 | 0.3 | -2.8 | 6.2 | 0.7 | -2.7 | |
Rural | 30 | 0.75 | 6.3 | 6.3 | 0.9 | -0.4 | 6.6 | 0.9 | 3.8 | |
South Atlantic | Urban | 120 | 0.44 | 5.2 | 4.9 | 0.6 | -6.3 | 5 | 0.8 | -2.8 |
Suburban | 321 | 0.55 | 5.8 | 5.6 | 0.7 | -3.3 | 5.9 | 0.8 | 1.5 | |
Rural | 452 | 0.55 | 5.3 | 5.3 | 0.7 | 1.2 | 5.7 | 0.8 | 7.5 | |
East South Central and West South Central | Urban | 82 | 0.32 | 5.9 | 6.1 | 0.7 | 3 | 6.2 | 1 | 6.1 |
Suburban | 80 | 0.31 | 6.2 | 6.7 | 0.9 | 6.8 | 6.9 | 1 | 10.8 | |
Rural | 167 | 0.31 | 5.7 | 5.7 | 0.8 | 0.3 | 6.5 | 1 | 14.9 | |
Mountain | Urban | 65 | 0.4 | 5.1 | 4.8 | 0.8 | -6.4 | 5.4 | 1.1 | 5.5 |
Suburban | 46 | 0.46 | 5.8 | 5.9 | 0.7 | 2.2 | 5.9 | 0.7 | 3.2 | |
Rural | 52 | 0.32 | 5.5 | 6 | 0.7 | 9.1 | 6.7 | 1 | 22 | |
Pacific | Urban | 108 | 0.5 | 5.7 | 5.4 | 0.7 | -5.5 | 5.7 | 1 | -0.3 |
Suburban | 47 | 0.49 | 6 | 5.5 | 1.1 | -7.9 | 6.3 | 1 | 5.8 | |
Rural | 47 | 0.39 | 5.6 | 5.8 | 0.8 | 3.1 | 6.1 | 1 | 8.7 |
NOTE: MAPE = Median absolute percent error. Absolute percent difference between NHTS data value and predicted data value calculated for each Census tract. Median of differences for each Census region/division and urban group calculated to find the MAPE. Percent difference is the difference between the median NHTS value for each Census region/division and urban group and the median predicted value.
States included by Census Region: Northeast = NY (excluding Census tracts in Manhattan), VT; Midwest = IN, IA, NE, SD; South Atlantic = FL, GA, NC, SC, VA; East South Central and West South Central = AL, TN, TX; Mountain = AZ; Pacific = CA
Table B5. Comparison of Means for Sample Used in Validating Models to Predict Person Miles
Census Region/ Division | Urban Group | Median Census Tract Value | Median Census Tract Value | Median Census Tract Value | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Household Income (Thousands) | Count of Household Vehicles | Count of Household Members | Count of Workers in Household | Homeowner (Percent) | 1+ Child < 18 (Percent) | 1 Person Household, <65 | 2+ Person Household, 0 65+ (Percent) | 2+ Person household, 1+ 65+ (Percent) | ||||||||||||||||||||
NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | ||
Northeast | Urban | 47.5 | 50.9 | 35.1 | 1.7 | 1.6 | 10.9 | 2.2 | 2.4 | 14 | 0.8 | 0.7 | 15.8 | 0.9 | 1.2 | 25.8 | 0.2 | 0.3 | 43.8 | 0.1 | 0.2 | 50.6 | 0.5 | 0.6 | 21.9 | 0.2 | 0.1 | 42.2 |
Suburban | 67.5 | 75.8 | 17.8 | 2 | 1.9 | 13.3 | 2.5 | 2.6 | 9.8 | 0.9 | 0.8 | 15.5 | 1 | 1.3 | 25.7 | 0.2 | 0.4 | 71.8 | 0.1 | 0.1 | 37.7 | 0.6 | 0.6 | 22 | 0.2 | 0.1 | 42.9 | |
Rural | 57.5 | 60.7 | 20.5 | 2.1 | 2 | 11.1 | 2.4 | 2.6 | 11.2 | 0.9 | 0.8 | 10.1 | 1.1 | 1.3 | 22.5 | 0.2 | 0.3 | 55.2 | 0.1 | 0.1 | 38.5 | 0.6 | 0.6 | 22 | 0.2 | 0.2 | 41.8 | |
Midwest | Urban | 47.5 | 52.8 | 16.3 | 2.1 | 1.8 | 15.8 | 2.4 | 2.4 | 7.9 | 0.9 | 0.7 | 22.3 | 1.2 | 1.3 | 19.4 | 0.2 | 0.3 | 52.9 | 0.1 | 0.2 | 32.7 | 0.5 | 0.6 | 23.2 | 0.2 | 0.1 | 61.1 |
Suburban | 67.5 | 55.1 | 12.7 | 2.2 | 1.9 | 12 | 2.4 | 2.4 | 8.8 | 0.9 | 0.8 | 16.5 | 1.1 | 1.2 | 12.9 | 0.2 | 0.3 | 69.2 | 0.1 | 0.2 | 88.7 | 0.6 | 0.6 | 17.6 | 0.2 | 0.1 | 37.4 | |
Rural | 65 | 70.6 | 11.2 | 2.5 | 2.2 | 9.5 | 2.8 | 2.7 | 13.5 | 0.9 | 0.9 | 9.8 | 1.3 | 1.5 | 13.3 | 0.3 | 0.4 | 52.2 | 0.1 | 0.1 | 42.2 | 0.7 | 0.7 | 15.6 | 0.2 | 0.1 | 32.8 | |
South Atlantic | Urban | 47.5 | 52.2 | 15.6 | 1.9 | 1.7 | 13.1 | 2.2 | 2.5 | 15 | 0.9 | 0.7 | 22.9 | 0.9 | 1.2 | 37.5 | 0.1 | 0.3 | 84.2 | 0.1 | 0.2 | 39.2 | 0.4 | 0.5 | 17.9 | 0.3 | 0.1 | 46.5 |
Suburban | 57.5 | 58.3 | 19.2 | 2.1 | 1.9 | 11.2 | 2.3 | 2.5 | 11.5 | 0.9 | 0.8 | 16.1 | 0.9 | 1.2 | 28 | 0.2 | 0.3 | 75.5 | 0.1 | 0.2 | 41 | 0.5 | 0.6 | 22.1 | 0.3 | 0.2 | 47.6 | |
Rural | 47.5 | 50.6 | 18.1 | 2.3 | 2.1 | 11.6 | 2.3 | 2.6 | 12.5 | 1 | 0.8 | 13.1 | 0.9 | 1.2 | 28.8 | 0.2 | 0.3 | 82.5 | 0.1 | 0.1 | 46.7 | 0.5 | 0.6 | 22.4 | 0.3 | 0.2 | 46 | |
East South Central and West South Central | Urban | 70 | 65.4 | 21 | 2.1 | 1.9 | 12.5 | 2.4 | 2.7 | 15.7 | 1 | 0.8 | 18.6 | 1.1 | 1.4 | 21.6 | 0.2 | 0.4 | 79.3 | 0.1 | 0.1 | 44.9 | 0.6 | 0.6 | 19.6 | 0.3 | 0.1 | 53.2 |
Suburban | 90 | 81.4 | 21.9 | 2.3 | 2 | 13.8 | 2.7 | 3 | 14.2 | 1 | 0.8 | 14.2 | 1.2 | 1.4 | 20.6 | 0.3 | 0.5 | 49.1 | 0 | 0.1 | 42.8 | 0.7 | 0.7 | 11.2 | 0.2 | 0.1 | 50.7 | |
Rural | 72.5 | 69 | 19 | 2.2 | 2.1 | 10.7 | 2.5 | 2.9 | 16.5 | 1 | 0.9 | 11.7 | 1 | 1.4 | 33.3 | 0.2 | 0.4 | 85.6 | 0.1 | 0.1 | 34.7 | 0.6 | 0.7 | 15.3 | 0.2 | 0.1 | 45.5 | |
Mountain | Urban | 47.5 | 46.7 | 17.7 | 1.8 | 1.7 | 13.1 | 2.1 | 2.5 | 20.9 | 0.9 | 0.7 | 25.9 | 0.9 | 1.3 | 46.3 | 0.1 | 0.3 | 75.3 | 0.1 | 0.2 | 39.7 | 0.4 | 0.5 | 33.9 | 0.3 | 0.1 | 52.6 |
Suburban | 66.3 | 71.3 | 17.2 | 2 | 1.9 | 7.7 | 2.3 | 2.5 | 14.1 | 1 | 0.8 | 12.9 | 1 | 1.2 | 24.8 | 0.1 | 0.3 | 38.6 | 0.1 | 0.1 | 42.7 | 0.5 | 0.6 | 20 | 0.3 | 0.2 | 40.6 | |
Rural | 65 | 66 | 14.9 | 2.2 | 2 | 12.1 | 2.4 | 2.8 | 12.7 | 0.9 | 0.9 | 9.7 | 1.1 | 1.3 | 33 | 0.2 | 0.4 | 48.4 | 0 | 0.1 | 63.3 | 0.5 | 0.6 | 20 | 0.4 | 0.2 | 44.9 | |
Pacific | Urban | 62.5 | 69.8 | 28.6 | 2.1 | 2 | 11.8 | 2.4 | 2.7 | 16.1 | 0.9 | 0.7 | 19.6 | 1 | 1.3 | 34.5 | 0.2 | 0.3 | 48.9 | 0.1 | 0.1 | 48.5 | 0.5 | 0.6 | 24.3 | 0.3 | 0.2 | 47.8 |
Suburban | 75 | 89.2 | 17.8 | 2.3 | 2.1 | 10.9 | 2.2 | 2.6 | 15.1 | 0.9 | 0.8 | 12.2 | 0.9 | 1.3 | 44.2 | 0.1 | 0.3 | 81.2 | 0.1 | 0.1 | 35.2 | 0.4 | 0.6 | 26.9 | 0.3 | 0.2 | 40.3 | |
Rural | 72.5 | 83.3 | 19 | 2.5 | 2.2 | 9.6 | 2.5 | 2.8 | 10.4 | 0.9 | 0.8 | 13.4 | 1 | 1.3 | 25.5 | 0.2 | 0.4 | 57.7 | 0 | 0.1 | 47.3 | 0.5 | 0.7 | 13.4 | 0.3 | 0.2 | 49.2 |
NOTE: MAPE = Median absolute percent error. Absolute percent difference between NHTS data value and ACS data value calculated for each Census tract. Median of differences for each Census region/division and urban group calculated to find the MAPE.
States included by Census Region: Northeast = NY (excluding Census tracts in Manhattan), VT; Midwest = IN, IA, NE, SD; South Atlantic = FL, GA, NC, SC, VA; East South Central and West South Central = AL, TN, TX; Mountain = AZ; Pacific = CA
Table B6. Comparison of Means for Sample Used in Validating Models to Predict Person Trips
Census Region/ Division | Urban Group | Median Census Tract Value | Median Census Tract Value | Median Census Tract Value | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Household Income (Thousands) | Count of Household Vehicles | Count of Household Members | Count of Workers in Household | Homeowner (Percent) | 1+ Child < 18 (Percent) | 1 Person Household, <65 | 2+ Person Household, 0 65+ (Percent) | 2+ Person household, 1+ 65+ (Percent) | ||||||||||||||||||||
NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | ||
Northeast | Urban | 47.5 | 50.9 | 34.2 | 1.7 | 1.6 | 11.4 | 2.2 | 2.4 | 15.7 | 0.8 | 0.7 | 14.1 | 0.9 | 1.2 | 26 | 0.2 | 0.3 | 42.8 | 0.1 | 0.2 | 50 | 0.5 | 0.6 | 20.4 | 0.2 | 0.1 | 42.2 |
Suburban | 67.5 | 75.5 | 17.9 | 2 | 1.9 | 13.1 | 2.5 | 2.6 | 10.2 | 0.9 | 0.8 | 15.3 | 1 | 1.3 | 25.5 | 0.2 | 0.4 | 74.4 | 0.1 | 0.1 | 38.9 | 0.5 | 0.6 | 22.4 | 0.3 | 0.1 | 42.9 | |
Rural | 57.5 | 60.8 | 20.4 | 2.2 | 2 | 10.4 | 2.4 | 2.5 | 11.1 | 0.9 | 0.8 | 10.1 | 1.1 | 1.3 | 22.5 | 0.2 | 0.3 | 54.7 | 0.1 | 0.1 | 37 | 0.6 | 0.6 | 21.3 | 0.2 | 0.2 | 42.7 | |
Midwest | Urban | 47.5 | 52.4 | 14.5 | 2.1 | 1.8 | 13.9 | 2.2 | 2.4 | 8 | 0.9 | 0.7 | 23.4 | 1.2 | 1.3 | 20.5 | 0.1 | 0.3 | 66.5 | 0.1 | 0.2 | 34.1 | 0.5 | 0.6 | 28.1 | 0.2 | 0.1 | 59 |
Suburban | 60 | 55.1 | 15.1 | 2.2 | 1.9 | 12 | 2.4 | 2.4 | 8.8 | 0.9 | 0.8 | 16.8 | 1.1 | 1.2 | 14.8 | 0.2 | 0.3 | 73.4 | 0.1 | 0.2 | 92.7 | 0.5 | 0.6 | 15.7 | 0.2 | 0.1 | 42.7 | |
Rural | 67.5 | 69.9 | 13.4 | 2.6 | 2.2 | 9.1 | 2.6 | 2.7 | 14.3 | 0.9 | 0.9 | 10 | 1.3 | 1.5 | 13.5 | 0.3 | 0.4 | 73.6 | 0.1 | 0.1 | 42.2 | 0.6 | 0.7 | 16.7 | 0.2 | 0.1 | 34.2 | |
South Atlantic | Urban | 47.5 | 51.5 | 15.9 | 1.9 | 1.7 | 12.3 | 2.2 | 2.5 | 15 | 0.9 | 0.7 | 22.6 | 0.8 | 1.2 | 38.7 | 0.1 | 0.3 | 85.7 | 0.1 | 0.2 | 39.3 | 0.4 | 0.5 | 17.8 | 0.3 | 0.1 | 45.8 |
Suburban | 57.5 | 57.3 | 18.6 | 2.1 | 1.9 | 11.5 | 2.3 | 2.5 | 11.5 | 0.9 | 0.8 | 16.1 | 0.9 | 1.2 | 28.4 | 0.1 | 0.3 | 78.7 | 0.1 | 0.2 | 42.4 | 0.5 | 0.6 | 22.1 | 0.3 | 0.2 | 47.5 | |
Rural | 47.5 | 50.6 | 19.2 | 2.3 | 2.1 | 11.6 | 2.3 | 2.6 | 12.5 | 1 | 0.8 | 13.4 | 0.9 | 1.2 | 28.9 | 0.2 | 0.3 | 82.8 | 0.1 | 0.1 | 49.8 | 0.5 | 0.6 | 21.4 | 0.3 | 0.2 | 46.3 | |
East South Central and West South Central | Urban | 70 | 66.6 | 22.8 | 2.1 | 1.9 | 12.2 | 2.4 | 2.7 | 16.3 | 1 | 0.8 | 18.6 | 1.1 | 1.4 | 24.4 | 0.1 | 0.4 | 83.4 | 0.1 | 0.1 | 43.3 | 0.6 | 0.6 | 19.6 | 0.3 | 0.1 | 52.7 |
Suburban | 90 | 80.5 | 21.4 | 2.3 | 2 | 13.8 | 2.6 | 3 | 12.8 | 1 | 0.8 | 14.2 | 1.2 | 1.4 | 22.3 | 0.3 | 0.5 | 70.7 | 0 | 0.1 | 42.1 | 0.7 | 0.7 | 11.7 | 0.2 | 0.1 | 51.5 | |
Rural | 71.3 | 68.7 | 18.5 | 2.2 | 2.1 | 10.5 | 2.4 | 2.9 | 17.9 | 1 | 0.9 | 10.7 | 1 | 1.4 | 35 | 0.2 | 0.4 | 83.5 | 0.1 | 0.1 | 34.7 | 0.6 | 0.7 | 16.7 | 0.2 | 0.1 | 44.6 | |
Mountain | Urban | 50 | 48.4 | 19.8 | 1.8 | 1.6 | 12.4 | 2.1 | 2.5 | 20.9 | 0.9 | 0.7 | 24.6 | 0.9 | 1.3 | 44.5 | 0.1 | 0.3 | 71.4 | 0.1 | 0.2 | 59.6 | 0.4 | 0.5 | 31.5 | 0.3 | 0.1 | 51.8 |
Suburban | 67.5 | 71.3 | 16.4 | 2 | 1.9 | 6.9 | 2.3 | 2.5 | 14.5 | 1 | 0.8 | 12.9 | 1 | 1.2 | 25.6 | 0.1 | 0.3 | 43.7 | 0.1 | 0.1 | 42.7 | 0.5 | 0.6 | 20 | 0.3 | 0.2 | 39.5 | |
Rural | 65 | 65.7 | 14.4 | 2.2 | 2 | 12.6 | 2.4 | 2.8 | 13.5 | 0.9 | 0.9 | 9.9 | 1.1 | 1.3 | 32.8 | 0.2 | 0.4 | 54.9 | 0 | 0.1 | 63.3 | 0.5 | 0.6 | 22.8 | 0.3 | 0.2 | 45.1 | |
Pacific | Urban | 62.5 | 69.8 | 28.6 | 2.1 | 2 | 10.6 | 2.4 | 2.6 | 16.4 | 0.9 | 0.7 | 18.4 | 1 | 1.3 | 34 | 0.2 | 0.3 | 50.6 | 0.1 | 0.1 | 47.2 | 0.5 | 0.6 | 24.3 | 0.3 | 0.2 | 47.7 |
Suburban | 77.5 | 89.2 | 16.4 | 2.3 | 2.1 | 11.2 | 2.3 | 2.6 | 13.5 | 0.9 | 0.8 | 12.2 | 0.9 | 1.3 | 40 | 0.2 | 0.3 | 78.5 | 0.1 | 0.1 | 41.5 | 0.5 | 0.6 | 25.2 | 0.3 | 0.2 | 38.2 | |
Rural | 73.1 | 84.8 | 18.6 | 2.5 | 2.2 | 9.8 | 2.5 | 2.8 | 10 | 0.9 | 0.8 | 13.3 | 1 | 1.3 | 24.4 | 0.2 | 0.4 | 49.9 | 0 | 0.1 | 42.7 | 0.5 | 0.7 | 13 | 0.3 | 0.2 | 47.8 |
NOTE: MAPE = Median absolute percent error. Absolute percent difference between NHTS data value and ACS data value calculated for each Census tract. Median of differences for each Census region/division and urban group calculated to find the MAPE.
States included by Census Region: Northeast = NY (excluding Census tracts in Manhattan), VT; Midwest = IN, IA, NE, SD; South Atlantic = FL, GA, NC, SC, VA; East South Central and West South Central = AL, TN, TX; Mountain = AZ; Pacific = CA
Table B7. Comparison of Means for Sample Used in Validating Models to Predict Vehicle Miles (continued)
Census Region/ Division | Urban Group | Median Census Tract Value | Median Census Tract Value | Median Census Tract Value | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Household Income (Thousands) | Count of Household Vehicles | Count of Household Members | Count of Workers in Household | Homeowner (Percent) | 1+ Child < 18 (Percent) | 1 Person Household, <65 | 2+ Person Household, 0 65+ (Percent) | 2+ Person household, 1+ 65+ (Percent) | ||||||||||||||||||||
NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | ||
Northeast | Urban | 47.5 | 50.4 | 34.4 | 1.7 | 1.6 | 11.1 | 2.2 | 2.3 | 15.5 | 0.8 | 0.7 | 15.1 | 0.9 | 1.2 | 25.8 | 0.2 | 0.3 | 52.8 | 0.1 | 0.2 | 50.6 | 0.5 | 0.6 | 20.8 | 0.2 | 0.1 | 41 |
Suburban | 67.5 | 15.3 | 19.4 | 2 | 1.9 | 13.4 | 2.5 | 2.6 | 10.1 | 0.9 | 0.8 | 15 | 1 | 1.3 | 25.3 | 0.2 | 0.4 | 64.6 | 0.1 | 0.1 | 37.7 | 0.5 | 0.6 | 22 | 0.3 | 0.1 | 42.5 | |
Rural | 57.5 | 13.4 | 20.5 | 2.2 | 2 | 11.1 | 2.4 | 2.5 | 11.2 | 0.9 | 0.8 | 10.1 | 1.1 | 1.3 | 22.5 | 0.2 | 0.3 | 56.8 | 0.1 | 0.1 | 41.2 | 0.6 | 0.6 | 22.1 | 0.2 | 0.2 | 41.5 | |
Midwest | Urban | 47.5 | 10.2 | 16.3 | 2.1 | 1.8 | 14.5 | 2.4 | 2.4 | 7.8 | 0.9 | 0.7 | 22.3 | 1.2 | 1.3 | 19.4 | 0.2 | 0.3 | 51.4 | 0.1 | 0.2 | 38.3 | 0.5 | 0.6 | 23.2 | 0.2 | 0.1 | 61.1 |
Suburban | 57.5 | 13.5 | 15 | 2.2 | 1.9 | 11.6 | 2.4 | 2.4 | 8.8 | 0.9 | 0.8 | 16.5 | 1.1 | 1.2 | 12.9 | 0.2 | 0.3 | 73.4 | 0.1 | 0.2 | 90.6 | 0.5 | 0.6 | 15.7 | 0.2 | 0.1 | 41.8 | |
Rural | 67.5 | 12.6 | 12.8 | 2.5 | 2.2 | 8.9 | 2.8 | 2.7 | 13.6 | 0.9 | 0.9 | 9.6 | 1.3 | 1.5 | 13.3 | 0.3 | 0.4 | 55.1 | 0.1 | 0.1 | 42.2 | 0.7 | 0.7 | 16.5 | 0.2 | 0.1 | 36.3 | |
South Atlantic | Urban | 47.5 | 12.2 | 15.6 | 1.9 | 1.7 | 13.1 | 2.2 | 2.5 | 15.1 | 0.9 | 0.7 | 22.9 | 0.9 | 1.2 | 37.5 | 0.1 | 0.3 | 81.8 | 0.1 | 0.2 | 41.9 | 0.4 | 0.5 | 17.9 | 0.3 | 0.1 | 46.5 |
Suburban | 57.5 | 12.2 | 19.1 | 2.1 | 1.9 | 11.2 | 2.3 | 2.5 | 11.3 | 0.9 | 0.8 | 16.3 | 0.9 | 1.2 | 28.4 | 0.2 | 0.3 | 75.3 | 0.1 | 0.2 | 41.9 | 0.5 | 0.6 | 21.9 | 0.3 | 0.2 | 47.8 | |
Rural | 47.5 | 11.8 | 18.6 | 2.3 | 2.1 | 11.9 | 2.4 | 2.6 | 12.6 | 1 | 0.8 | 13.3 | 0.9 | 1.2 | 28.9 | 0.2 | 0.3 | 80.6 | 0.1 | 0.1 | 48.6 | 0.5 | 0.6 | 21.4 | 0.3 | 0.2 | 46.4 | |
East South Central and West South Central | Urban | 68.8 | 12.2 | 20 | 2 | 1.9 | 13.4 | 2.4 | 2.7 | 16.4 | 1 | 0.8 | 18.1 | 1.1 | 1.4 | 23.5 | 0.2 | 0.4 | 76.9 | 0.1 | 0.1 | 38 | 0.6 | 0.6 | 20.1 | 0.3 | 0.1 | 52.7 |
Suburban | 90 | 8.7 | 21.9 | 2.3 | 2 | 13.8 | 2.8 | 3 | 12.2 | 1 | 0.8 | 14.4 | 1.2 | 1.4 | 20.6 | 0.3 | 0.5 | 47.8 | 0 | 0.1 | 45.2 | 0.7 | 0.7 | 11.2 | 0.2 | 0.1 | 52.2 | |
Rural | 72.5 | 10.4 | 19.2 | 2.2 | 2.1 | 10.4 | 2.5 | 2.9 | 17.3 | 1 | 0.9 | 11.8 | 1 | 1.4 | 34.4 | 0.2 | 0.4 | 79.8 | 0.1 | 0.1 | 34.8 | 0.6 | 0.7 | 15.1 | 0.2 | 0.1 | 45.2 | |
Mountain | Urban | 47.5 | 10.4 | 18.2 | 1.8 | 1.6 | 13.1 | 2.1 | 2.5 | 20.5 | 0.9 | 0.7 | 25.6 | 0.9 | 1.3 | 46.6 | 0.1 | 0.3 | 74.5 | 0.1 | 0.2 | 42.9 | 0.4 | 0.5 | 33.1 | 0.3 | 0.1 | 53.9 |
Suburban | 66.3 | 9.2 | 18 | 2 | 1.9 | 7.7 | 2.3 | 2.5 | 14.5 | 1 | 0.8 | 11.9 | 0.9 | 1.2 | 27.8 | 0.1 | 0.3 | 40.6 | 0.1 | 0.1 | 39.8 | 0.5 | 0.5 | 18.5 | 0.3 | 0.2 | 40.7 | |
Rural | 65 | 14.9 | 13.8 | 2.2 | 2 | 12.1 | 2.4 | 2.8 | 12.7 | 0.9 | 0.9 | 10.2 | 1.1 | 1.3 | 32.6 | 0.2 | 0.4 | 48.4 | 0 | 0.1 | 63.3 | 0.5 | 0.6 | 20 | 0.4 | 0.2 | 43.6 | |
Pacific | Urban | 62.5 | 15.1 | 28.6 | 2.1 | 2 | 10.6 | 2.4 | 2.7 | 16.4 | 0.9 | 0.7 | 19.6 | 1 | 1.3 | 34.5 | 0.2 | 0.3 | 46.9 | 0.1 | 0.1 | 48.5 | 0.5 | 0.6 | 24.1 | 0.3 | 0.2 | 47.6 |
Suburban | 77.5 | 12.2 | 16.4 | 2.3 | 2.1 | 10.9 | 2.2 | 2.6 | 14.3 | 0.9 | 0.8 | 12.2 | 0.9 | 1.3 | 44.2 | 0.1 | 0.3 | 81.2 | 0.1 | 0.1 | 35.2 | 0.4 | 0.6 | 26.9 | 0.3 | 0.2 | 38.9 | |
Rural | 72.5 | 10.6 | 19 | 2.5 | 2.2 | 9.6 | 2.5 | 2.8 | 10.5 | 0.9 | 0.8 | 13.4 | 1 | 1.3 | 25.5 | 0.2 | 0.4 | 49 | 0 | 0.1 | 42.7 | 0.5 | 0.7 | 14.3 | 0.3 | 0.2 | 47 |
NOTE: MAPE = Median absolute percent error. Absolute percent difference between NHTS data value and ACS data value calculated for each Census tract. Median of differences for each Census region/division and urban group calculated to find the MAPE.
States included by Census Region: Northeast = NY (excluding Census tracts in Manhattan), VT; Midwest = IN, IA, NE, SD; South Atlantic = FL, GA, NC, SC, VA; East South Central and West South Central = AL, TN, TX; Mountain = AZ; Pacific = CA
Table B8. Comparison of Means for Sample Used in Validating Models to Predict Vehicle Trips (continued)
Census Region/ Division | Urban Group | Median Census Tract Value | Median Census Tract Value | Median Census Tract Value | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Household Income (Thousands) | Count of Household Vehicles | Count of Household Members | Count of Workers in Household | Homeowner (Percent) | 1+ Child < 18 (Percent) | 1 Person Household, <65 | 2+ Person Household, 0 65+ (Percent) | 2+ Person household, 1+ 65+ (Percent) | ||||||||||||||||||||
NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | NHTS | ACS | MAPE ACS v. NHTS | ||
Northeast | Urban | 47.5 | 50.9 | 34.2 | 1.7 | 1.6 | 11.4 | 2.2 | 2.4 | 16 | 0.8 | 0.7 | 14.1 | 0.9 | 1.2 | 27.9 | 0.2 | 0.3 | 42.8 | 0.1 | 0.2 | 50 | 0.5 | 0.6 | 19.9 | 0.2 | 0.1 | 42.2 |
Suburban | 67.5 | 75.5 | 18.7 | 2 | 1.9 | 13.4 | 2.5 | 2.6 | 10 | 0.9 | 0.8 | 15.3 | 1 | 1.3 | 25.8 | 0.2 | 0.4 | 73.6 | 0.1 | 0.1 | 38.9 | 0.5 | 0.6 | 22 | 0.2 | 0.1 | 42.9 | |
Rural | 57.5 | 60.8 | 20.4 | 2.1 | 2 | 10.4 | 2.4 | 2.5 | 11.1 | 0.9 | 0.8 | 10.1 | 1.1 | 1.3 | 22.8 | 0.2 | 0.3 | 53.4 | 0.1 | 0.1 | 38.5 | 0.6 | 0.6 | 21.3 | 0.2 | 0.2 | 43 | |
Midwest | Urban | 47.5 | 51.1 | 16.2 | 2.1 | 1.8 | 15.4 | 2.2 | 2.4 | 8.2 | 0.9 | 0.7 | 22.5 | 1.2 | 1.3 | 19.8 | 0.1 | 0.3 | 64.5 | 0.1 | 0.2 | 34.1 | 0.5 | 0.6 | 23.3 | 0.2 | 0.1 | 60.4 |
Suburban | 62.5 | 55.1 | 14.6 | 2.2 | 1.9 | 12 | 2.4 | 2.4 | 8.8 | 0.9 | 0.8 | 16.7 | 1.1 | 1.2 | 14.8 | 0.2 | 0.3 | 73.4 | 0.1 | 0.2 | 94.8 | 0.6 | 0.6 | 15.7 | 0.2 | 0.1 | 41.3 | |
Rural | 67.5 | 69.3 | 13.5 | 2.5 | 2.2 | 9.5 | 2.8 | 2.7 | 13.6 | 0.9 | 0.9 | 9.8 | 1.3 | 1.5 | 13.8 | 0.3 | 0.4 | 56 | 0.1 | 0.1 | 42.2 | 0.7 | 0.7 | 15.6 | 0.2 | 0.1 | 36.3 | |
South Atlantic | Urban | 47.5 | 52.1 | 15.6 | 1.9 | 1.7 | 12.3 | 2.2 | 2.5 | 14.9 | 0.9 | 0.7 | 22.6 | 0.8 | 1.2 | 35.3 | 0.1 | 0.3 | 83.7 | 0.1 | 0.2 | 38.9 | 0.4 | 0.5 | 17.6 | 0.3 | 0.1 | 46.2 |
Suburban | 57.5 | 57.3 | 19.1 | 2.1 | 1.9 | 11.5 | 2.3 | 2.5 | 11.4 | 0.9 | 0.8 | 16.1 | 0.9 | 1.2 | 27.7 | 0.2 | 0.3 | 75.6 | 0.1 | 0.2 | 41.9 | 0.5 | 0.6 | 22.2 | 0.3 | 0.2 | 47.6 | |
Rural | 47.5 | 50.6 | 19 | 2.3 | 2.1 | 11.6 | 2.4 | 2.6 | 12.5 | 1 | 0.8 | 13.3 | 0.9 | 1.2 | 29.5 | 0.2 | 0.3 | 80.6 | 0.1 | 0.1 | 49.7 | 0.5 | 0.6 | 21.2 | 0.3 | 0.2 | 46.3 | |
East South Central and West South Central | Urban | 68.8 | 66.2 | 21.4 | 2.1 | 1.9 | 13.1 | 2.4 | 2.7 | 16.4 | 1 | 0.8 | 18.6 | 1.1 | 1.4 | 25 | 0.1 | 0.4 | 88.9 | 0.1 | 0.1 | 40.6 | 0.6 | 0.6 | 20.1 | 0.3 | 0.1 | 52.9 |
Suburban | 90 | 81.4 | 21.6 | 2.3 | 2 | 13.4 | 2.7 | 3 | 12.3 | 1 | 0.8 | 14.2 | 1.2 | 1.4 | 19.4 | 0.3 | 0.4 | 50.4 | 0 | 0.1 | 39.3 | 0.7 | 0.7 | 11.5 | 0.2 | 0.1 | 50.8 | |
Rural | 70 | 68.5 | 18.3 | 2.2 | 2.1 | 9.8 | 2.5 | 2.9 | 17.5 | 1 | 0.9 | 11 | 1 | 1.4 | 34.4 | 0.2 | 0.4 | 84.7 | 0.1 | 0.1 | 34.2 | 0.6 | 0.7 | 17 | 0.2 | 0.1 | 44.8 | |
Mountain | Urban | 50 | 48.6 | 19.5 | 1.7 | 1.7 | 12 | 2.1 | 2.5 | 20.9 | 0.9 | 0.7 | 24.8 | 0.9 | 1.3 | 44.9 | 0.1 | 0.3 | 73.8 | 0.1 | 0.2 | 60.5 | 0.4 | 0.5 | 32.5 | 0.3 | 0.1 | 52.1 |
Suburban | 67.5 | 71.3 | 16.4 | 2 | 1.9 | 6.9 | 2.3 | 2.5 | 14.5 | 1 | 0.8 | 12.9 | 1 | 1.2 | 25.6 | 0.1 | 0.3 | 43.7 | 0.1 | 0.1 | 42.7 | 0.5 | 0.6 | 20 | 0.3 | 0.2 | 39.5 | |
Rural | 65 | 65.7 | 13.3 | 2.3 | 2 | 12.6 | 2.4 | 2.8 | 12.6 | 0.9 | 0.9 | 9.9 | 1.1 | 1.3 | 32.5 | 0.2 | 0.4 | 49.5 | 0 | 0.1 | 63.3 | 0.5 | 0.6 | 22.6 | 0.3 | 0.2 | 45.1 | |
Pacific | Urban | 62.5 | 69.8 | 28.3 | 2.1 | 2 | 11.3 | 2.4 | 2.7 | 16.2 | 0.9 | 0.7 | 18.7 | 1 | 1.3 | 33.3 | 0.2 | 0.3 | 48.9 | 0.1 | 0.1 | 48.5 | 0.5 | 0.6 | 24.3 | 0.3 | 0.2 | 47.7 |
Suburban | 77.5 | 89.2 | 16.4 | 2.3 | 2.1 | 11.2 | 2.3 | 2.6 | 13.5 | 0.9 | 0.8 | 12.2 | 0.9 | 1.3 | 40 | 0.2 | 0.3 | 78.5 | 0.1 | 0.1 | 41.5 | 0.5 | 0.6 | 25.2 | 0.3 | 0.2 | 38.2 | |
Rural | 73.8 | 84.8 | 19 | 2.5 | 2.2 | 9.6 | 2.5 | 2.8 | 10.4 | 0.9 | 0.8 | 13.6 | 1 | 1.3 | 25.5 | 0.2 | 0.4 | 49 | 0 | 0.1 | 42.7 | 0.5 | 0.7 | 13.4 | 0.3 | 0.2 | 47 |
NOTE: MAPE = Median absolute percent error. Absolute percent difference between NHTS data value and ACS data value calculated for each Census tract. Median of differences for each Census region/division and urban group calculated to find the MAPE.
States included by Census Region: Northeast = NY (excluding Census tracts in Manhattan), VT; Midwest = IN, IA, NE, SD; South Atlantic = FL, GA, NC, SC, VA; East South Central and West South Central = AL, TN, TX; Mountain = AZ; Pacific = CA