Analysis of the Vehicle Inventory and Use Survey for Trucks ... - About

Sample Size in Regional Comparison of Mean Tare (Empty) Weights
by Vehicle Class/Body Type Combinations
North Central North East South Atlantic South Gulf West
Config. Body Type 1987 1992 1997 1987 1992 1997 1987 1992 1997 1987 1992 1997 1987 1992 1997
3+2 Low Boy 7 8 4 6 3 4 18 5 6 14 10 9 8 13 22
3+2 Basic Platform 27 12 13 15 10 8 13 9 10 39 30 19 94 78 73
3+2 Basic Enclosed 15 4 3 1 4 1 2 6 1 14 14 7 10 5 8
3+2 Pole Logging 2 10 23 1 4 13 9 3 20 39 27 105 96 50
3+2 Grain Bodies 18 22 35 . 1 45 . 1 1 5 16 7 16 16 17
3+2 Dump Truck 41 49 7 30 60 . 16 8 20 28 29 33 138 230 170
3+2 Tank-Liquid 14 6 202 3 9 147 . 6 1 7 2 5 41 58 52
3-S2 Low Boy 235 260 586 200 225 321 187 207 139 140 148 98 234 286 205
3-S2 Basic Platform 1,020 1,004 109 555 548 2 595 637 402 684 750 551 841 1,125 568
3-S2 Livestock 170 200 241 7 13 28 18 33 23 59 49 19 78 148 80
3-S2 Ins. Non-ref 132 98 692 36 39 177 48 43 13 40 31 19 66 34 24
3-S2 Ins. Ref 848 1,130 72 214 403 35 329 487 275 333 404 266 363 810 435
3-S2 Drop Frame 150 154 1265 60 87 694 39 47 46 42 55 30 30 77 67
3-S2 Basic Enclosed 1,522 2,402 33 845 1,279 15 866 1,249 782 1,143 1,260 888 451 598 487
3-S2 Pole Logging 13 46 28 25 39 16 116 242 135 128 247 166 297 318 145
3-S2 Auto Transport 73 118 595 30 20 16 66 27 17 40 44 21 23 33 29
3-S2 Grain Bodies 418 707 221 13 19 167 25 76 62 137 223 136 133 178 109
3-S2 Dump Truck 215 295 275 225 322 230 193 287 165 271 337 184 416 631 367
3-S2 Tank-Liquid 397 500 91 284 462 44 272 338 180 299 426 242 228 310 180
3-S2 Tank-Dry 85 134 65 54 71 47 82 120 67 59 102 65 52 58 53
3-S3 Low Boy 99 108 56 44 55 44 44 45 30 61 88 64 60 112 64
3-S3 Basic Platform 68 66 8 27 62 4 18 16 17 27 11 14 34 22 28
3-S3 Ins. Ref 12 9 28 6 4 14 9 5 8 3 7 6 19 9 11
3-S3 Basic Enclosed 29 33 4 19 21 72 26 22 10 31 13 58 28 19 35
3-S3 Pole Logging 2 10 32 32 82 1 . 8 4 3 5 6 3 19 6
3-S3 Grain Bodies 18 20 96 1 . 48 1 2 . 1 2 1 9 8 11
3-S3 Dump Truck 79 167 12 37 64 31 29 67 29 36 60 56 23 48 41
3-S3 Tank-Liquid 22 22 3 7 28 8 6 8 2 15 15 17 45 13
2-S1-2 Basic Platform 2 2 20 . 1 . . . 1 . 2 33 53 29
2-S1-2 Drop Frame 10 7 26 . 6 1 . 10 . 1 3 48 4 7 1
2-S1-2 Basic Enclosed 76 61 1 17 14 12 22 17 25 37 . 81 55 190
2-S1-2 Grain Bodies 3 7 . . . . . . . . 19 11 5