Surely you have to design for the worst case or your road surface will crack. Surely there will be heavy trucks moving from one construction site in the township to another?

Thanks for your input Mr Ian. Can you please elaborate how should I Go about heavy truck calculation (As there is no conformity over a schedule of construction activity)

Where are the trucks likely to come from? (Outside the township: so use the main entrances as ingress points) Where do they go to? (Where the houses are not yet built: so plan sufficient routes for them.) Remember truck drivers are self-autonomous, and will seek the shortest routes!

For e.g. there are 2 access roads for outside vehicles to enter in the township otherwise township is covered with fencing. Those two access roads are already designed for certain msa. Is it ok if I interpret the traffic in township as addition of msa's obtained for access road + traffic generated inside the township (e.g.buses) in terms of msa for given design period.

You have to add the million standard (80 kN) axles for dual wheeled axles passing over each road. When the million axles have gone over that part of the road, the road is gone! This should be a dozen years later, and you can start your design over again! It would be sensible to have the the internal roads expire at the same time as the access roads, so that they can all be upgraded in one project in 12 years time. Your bus routes will have half the (bus) axles that an access road has because the buses go in and out one access, and travel on the bus route through the township. So in this case, the bus routes can be designed to a lower strength than the access roads. Also the non-bus routes will only carry busses that get lost(!), and can have a much lower strength. Just check whether each bus goes in and out of the same access road as I assumed in the case above or in one and out another.

Hi lan

can you please provide me typical thickness of each layer of the pavement for different road classes and properties as well such as modulus of elasticity and Poisson ratio. it would be pleasure of me if anyone of the highways group do so.