TABLE 1 - Work Zone Platoon Characteristics | Bureau of Transportation Statistics

TABLE 1 - Work Zone Platoon Characteristics

A. Short-Term Work Zone

Platoon size	Truck-leading platoon			Nontruck-leading platoon
Platoon size	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
Platoon size	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