Cross Classification

The following cross-classification data have been developed for Beaver Dam Transportation Study Area.

 (\$000) HH (%) Autos/HH (%) Income High Med Low 0 1 2 3 10 0 30 70 48 48 4 0 20 0 50 50 4 72 24 0 30 10 70 20 2 53 40 5 40 20 75 5 1 32 52 15 50 50 50 0 0 19 56 25 60 70 30 0 0 10 60 30

 (\$000) Trip Rate/Auto Trips (%) Income 0 1 2 3+ HBW HBO NHB. 10 2.0 6.0 11.5 17.0 38 34 28 20 2.5 7.5 12.5 17.5 38 34 28 30 4.0 9.0 14.0 19.0 35 34 31 40 5.5 10.5 15.5 20.5 27 35 38 50 7.5 12.0 17.0 22.0 20 37 43 60 8.0 13.0 18.0 23.0 16 40 44

Develop the family of cross classification curves and determine the number of trips produced (by purpose) for a traffic zone containing 500 houses with an average household income of \$35,000. (Use high = 55,000; medium = 25,000; low = 15,000)

[Solution Shown Below]

Solution

The solution to this type of problem is best described through the use of graphs and tables.  The graphs and tables used for this problem are shown below.

 Income Households (%) HH/Zone Total HH Low \$under \$20,000 13 500 65 Medium \$20,000-45,000 72 500 360 High \$45,000-\$60,000 15 500 75 100 500 Percentage of HH owning # vehicles Auto Ownership Income Low Medium High 0 26 3 0 1 60 63 15 2 14 32 58 3+ 0 2 27 100 100 100 Trips per HH per Income Level and Auto Ownership Auto Ownership Income Low Medium High 0 2 3 7 1 7 8 13 2 12 13 18 3+ 17 18 23 Number of HH owning # vehicles Auto Ownership Income Low Medium High 0 17 11 0 1 39 227 11 2 9 115 44 3+ 0 7 20 65 360 75 Trips made by income level Auto Ownership Income Low Medium High 0 34 32 0 1 273 1814 146 2 109 1498 783 3+ 0 130 466 416 3474 1395 5285 Trips by Trip Purpose % Income Low Medium High HBW 38 37 18 HBO 34 34 38 NHB 28 29 44 100 100 100 Number of Trips by Purpose Income Low Medium High HBW 158 1285 251 1695 HBO 141 1181 530 1853 NHB 116 1007 614 1738