Can’t get back to all the comments, thanks all <3
EDIT: I used HILLS and not MOUNTAINS on purpose lol, c’mon guys I’m not *that* clueless. Tunnels absolutely do not figure into my question. Thank you everyone for answering this has been enlightening.
EDIT 2: I don’t think it has occurred to some browsers of this sub that the people asking these questions have probably considered their own question and come up with hypotheses already. Trust me, I had 2 hours longer to drive and think after I posted the question at a gas station haha. has confirmed some of my hypotheses about this and also added many new pieces of information to the puzzle which I am grateful for. Some of you taking time out of your day to say “stupid question” or something along those lines, please don’t consider becoming teachers, and go forth in this sub operating under the assumption that a lot of the questions asked here are not just asked out of curiosity, but also just seeking confirmation of hypotheses before going out into the world and spewing BS lol.
In: Engineering
It comes down to the fact that if you don’t blast through hills, your roads have to either go up and down a lot, have a lot of curves, or both. The more curves you have and the more you have to go up and down, the slower you have to drive. A lot of curves and up’s and down’s also means that the road is longer than if it goes in a practically straight line, so even if you could drive at the same speed, it would still take longer.
Another Problem if the road goes up and down a lot is that it’s a lot harder on the cars and trucks driving over them. Think of when you’re on a bicycle. What wears you out more, the straight, flat bike bath, or the one that goes up and down and has a lot of curves? Well, the same applies to the cars and trucks.
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