A concrete driveway takes 24 to 48 hours to dry. Walking on the driveway without damaging the concrete is possible after this time. Even though concrete is solid after two days, there are still time limits on what the driveway can handle.
It is not advisable to use skateboards or bicycles on the driveway between day two and day seven. Concrete hardens enough to drive on after one week but only for normal-sized vehicles. For the first month after a concrete driveway is poured, it continues to harden. It typically reaches full driving capacity for any size vehicle after 30 days.