Inspired by \'Fumes concrete thread, a concrete question I happen to be in driveway misery right now... Fumes post gave me helpful info on concrete, but to expand on that a little? I'm going to need enough concrete for a 75'x10' driveway. At 4" thick, the calculator said I need 9.17 cubic yards. At 5", I need 11+ CY. What thickness should I be thinking about for a driveway of this length? Also, one guy I talked to asked if I wanted 2000 or 3000 psi. What should I go for? A 6000lb K5 will probably be the most weight this driveway ever sees (1500lbs per wheel, conservatively 4sq inch of wheel on surface = 375psi; is this safe?). I also want it to slope a little to send water to the road. Anyone have a suggestion for the degree of the slope needed? That'll help me figure how high it needs to be at the end. Thanks all.