TABLE 1 - Work Zone Platoon Characteristics

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