Bureau of Transportation Statistics (BTS)
BTS Home > Publications > Journal of Transportation and Statistics > Volume 8 Number 2 > Paper 6
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TABLE 1 - Work Zone Platoon Characteristics

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A. Short-Term Work Zone

Platoon size Truck-leading platoon Nontruck-leading platoon
Relative frequency Headway (seconds) Gap (seconds) Relative frequency Headway (seconds) Gap (seconds)
2 0.451 2.819 1.991 0.553 2.045 1.680
3 0.241 2.593 1.857 0.241 2.098 1.699
4 0.165 2.398 1.751 0.093 2.167 1.735
5 0.057 2.201 1.627 0.059 2.129 1.693
6 0.035 2.109 1.577 0.017 2.333 1.852
7 0.032 2.263 1.733 0.012 2.109 1.685
8 0.003 2.344 1.510 0.010 2.212 1.740
9 0.006 2.394 1.575 0.010 2.243 1.741
10 0.003 3.348 2.732 0.003 2.598 2.082
11 0.003 2.321 1.714 – – –
12 – – – – – –
13 – – – – – –
14 – – – – – –
15 0.003 2.267 1.649 – – –
≥16 – – – – – –
Average 3.20 (size) 2.611 1.872 2.89 (size) 2.085 1.696

B. Long-Term Work Zone

Platoon size Truck-leading platoon Nontruck-leading platoon
Relative frequency Headway (seconds) Gap (seconds) Relative frequency Headway (seconds) Gap (seconds)
2 0.450 2.356 1.739 0.524 1.719 1.416
3 0.243 2.194 1.575 0.228 1.756 1.439
4 0.117 2.017 1.447 0.118 1.853 1.514
5 0.077 1.974 1.482 0.055 1.828 1.467
6 0.049 1.856 1.371 0.031 1.844 1.438
7 0.019 1.915 1.427 0.016 1.705 1.303
8 0.019 2.077 1.529 0.01 1.533 1.216
9 0.007 2.074 1.448 0.006 2.242 1.667
10 0.007 2.194 1.755 0.003 1.690 1.304
11 0.001 1.560 1.293 0.002 2.135 1.726
12 0.007 1.991 1.532 0.003 1.956 1.546
13 – – – 0.001 2.305 1.864
14 – – – 0.001 1.933 1.660
15 – – – – – –
16 – – – – – –
17 0.001 1.588 1.246 0.001 2.185 1.608
18 0.001 1.566 1.249 0.001 2.155 1.758
19 – – – – – –
≥20 0.001 2.084 1.744 – – –
Average 3.38 (size) 2.2 1.612 3.06 (size) 1.757 1.436
Research and Innovative Technology Administration (RITA) • U.S. Department of Transportation (US DOT)
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