>>4595332 (PB)
Gerrymandering to favor Democrats AND Muslima's
Geez, I hope the folks engaging in this discussion are just dipshit thread wasters. I'd hate to think that this is how they actually think. Concrete gives good wear and load bearing and traction plus, it's modulus of expansion is less than most steel. If you think concrete buckling in the heat of the summer sun is bad, just wait till you get a ride on a locomotive and see how kinked up the rail can get. Both of them benefit from expansion strips but rail will flex enough to pull the spikes out of the ties. You haven't lived until you've hit a piece of rail and watched its far end lift up into the air and describe an arc before setting back down again.
Both materials have their places.