Page 45 - RoadCem Manual - PCT BV

Working days-total (W)
Figure 3.10 Amount of trucks.
There are 250 working days each year but lately more and more trucks are using the roads in the weekends and holidays. For example the authorities in the Netherlands registered that during weekend days on average 1/6 of the heavy goods traffic are present compared to a normal working day. Based on this information it is recommended to use 270 working days per year as a design criteria.
Truck traffic velocity (Fr)
If the traffic speed is slower than 80km/h (design driving speed for trucks) then the damage factor as a result of the slow traffic will increase. It is clear that congestion also has a negative effect on the lifespan of an asphalt pavement construction. Traffic speed has very little effect on a concrete pavement construction. Traffic jams on asphalt roads increase the load on the road surface by a factor 1, 76. The traffic speed is important basic information for design because a RoadCem pavement is also a viscous-elastic material like asphalt.
The choice of traffic speed for a design is strongly dependant on the route and the legally allowed speed on the road.
Table 3.3 Correction coefficient for the speed of the truck traffic.
20 1,76 40 1,33 60 1,12 80 1,00
Speed km/h
Fv
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