Table 2. Transportation cost of round wood and friction coefficients.

Type of surface transportation
Cost
(U.S.$/m3/km)
Friction
coefficient
Data source
River
Floating logs guided by a boat
0.01
1
Barros and Uhl (1995)
Towed barge
0.08
1
Barros and Uhl (1995)
 
Paved road
Large truck
0.05
5
Stone (1998)
Medium-sized truck
0.01
5
Veríssimo et al. (1992)
Small truck
0.01
5
Veríssimo et al. (2000)
 
Unpaved road (regular condition or maintenance)
Large truck
0.10
10
Stone (1998)
Medium-sized truck
0.24
10
Veríssimo et al. (1992)
Small truck
0.30
10
Barros and Uhl (1995)
 
Unpaved road (poor condition or maintenance)
Truck
0.60
60
Veríssimo et al. (2000)
 
Forest trails
Truck
1.0–2.0
100
Stone (1998)