Review of Truck Characteristics as Factors in Roadway Design (2003) / Chapter Skim
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From page 127... ...
B-1 APPENDIX B WEIGH STATION DATA COLLECTION This appendix discusses the data collection activities conducted at weigh stations to gather data on trailer length, rear overhang, and the usage of antilock brake systems (ABS) in the existing truck population.
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trucks that were instructed by the scale operator to proceed to the static scales. A large percentage of the trucks that passed over the static scales during the data collection period were measured for this research.
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the table shows that van type configurations are the most prevalent on highways. Of the 1,499 trailers measured, 1,026 were vans.
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B-4 TABLE B-2 Frequency of trailer greater than 53 ft in length by truck configuration and by state State Configuration Number of trailers 53 ft in length or less Number of trailers greater than 53 ft in length Number of trailers measured Percentage of trailers greater than 53 ft in length Van 348 2 350 0.6 Flat Bed 104 0 104 0.0 Grain 17 0 17 0.0 Tanker 35 0 35 0.0 Low Boy 7 0 7 0.0 Auto 10 2 12 16.7 Other 18 0 18 0.0 KS Totals 539 4 543 0.7 Van 317 15 332 4.5 Flat Bed 99 2 101 2.0 Grain 4 0 4 0.0 Tanker 44 0 44 0.0 Low Boy 9 1 10 10.0 Auto 7 5 12 41.7 Other 21 0 21 0.0 TX Totals 501 23 524 4.4 Van 344 0 344 0.0 Flat Bed 34 0 34 0.0 Grain 12 0 12 0.0 Tanker 19 0 19 0.0 Low Boy 8 0 8 0.0 Auto 12 1 13 7.7 Other 2 0 2 0.0 MO1 Totals 431 1 432 0.2 Total for All 3 States 1471 28 1499 1.9 Totals for KS & TX 1040 27 1067 2.5 1 Trailers over 53 ft in length are not permitted to operate on Missouri highways without a permit. TABLE B-3 Frequency of trailers greater than 53 ft in length by truck configuration Configuration Number of trailers 53 ft in length or less Number of trailers greater than 53 ft in length Number of trailers measured Percentage of trailers greater than 53 ft in length Van 1009 17 1026 1.7 Flat Bed 237 2 239 0.8 Grain 33 0 33 0.0 Tanker 98 0 98 0.0 Low Boy 24 1 25 4.0 Auto 29 8 37 21.6 Other 41 0 41 0.0 Totals 1471 28 1499 1.9 NOTE: Data for all three states combined.
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B-5 Length of rear overhang State Configuration 0 - 4 ft 4 - 8 ft 8 - 12 ft 12 - 16 ft 16 - 20 ft 20 - 24 ft Total Van 2 79 217 54 0 0 352 Flat Bed 1 76 24 3 0 0 104 Grain 5 11 1 0 0 0 17 Tanker 8 27 0 0 0 0 35 Low Boy 3 3 0 1 0 0 7 Auto 1 3 1 3 4 0 12 Other 5 12 1 0 0 0 18 KS Totals 25 211 244 61 4 0 545 Van 7 68 150 79 1 0 335 Flat Bed 1 67 28 5 0 0 101 Grain 1 3 0 0 0 0 4 Tanker 1 41 0 2 0 0 44 Low Boy 0 8 0 2 0 0 10 Auto 0 0 0 4 7 1 12 Other 4 14 1 1 1 0 21 TX Totals 14 201 209 93 9 1 527 Van 1 77 204 61 0 0 343 Flat Bed 0 21 12 1 0 0 34 Grain 8 4 0 0 0 0 12 Tanker 5 14 0 0 0 0 19 Low Boy 2 2 2 2 0 0 8 Auto 0 1 1 4 7 0 13 Other 1 0 0 1 0 0 2 MO Totals 17 119 219 69 7 0 431 Total for All 3 States 56 531 672 223 20 1 1503 Percentage of Totals 3.73 35.33 44.71 14.84 1.33 0.07 TABLE B-5 Frequency of trailers with ABS by configuration and by state State Trailer configuration Number of trailers with ABS Number of trailers without ABS Number of trailers observed Percent of trailers with ABS Van 161 190 351 45.9 Flat Bed 36 67 103 35.0 Grain 7 11 18 38.9 Tanker 11 27 38 29.0 Low Boy 2 5 7 28.6 Auto 1 8 9 11.1 Double 4 20 24 16.7 Triple 2 10 12 16.7 Other 5 13 18 27.8 KS Total 229 351 580 39.5 Van 35 50 85 41.2 Flat Bed 9 14 23 39.1 Grain 1 0 1 100.0 Tanker 4 11 15 26.7 Low Boy 0 3 3 0.0 Auto 3 2 5 60.0 Double 4 10 14 28.6 Triple 0 0 0 0.0 Other 2 9 11 18.2 TX Total 58 99 157 36.9 Van 261 239 500 52.2 Flat Bed 27 47 74 36.5 Grain 6 14 20 30.0 Tanker 4 19 23 17.4 Low Boy 2 4 6 33.3 Auto 7 6 13 53.9 Double 21 39 60 35.0 Triple 0 0 0 0.0 Other 2 14 16 12.5 MO Total 330 382 712 46.4 Total for All 3 States 617 832 1449 42.6 TABLE B-4 Frequency of rear overhang length by truck configuration and by state
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that the sample size of triple trailers was small (12 trailers observed)
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