ATM machines are available all over Mexico, except in Arteaga proper, so it is not necessary to bring a lot of cash. You can change dollars to pesos in Arteaga. Crossing the Border at Laredo Fill up your gas tank in the US where gas is cheaper. You may want to change some dollars to pesos on the American side, just because they speak English. You can usually get a slightly better exchange rate in Mexico, but it is not worth the hassle.
Toll booths accept American money, but they don t give a great exchange rate.
Continue on this road all the way to the bridge. At this time we do not have additional information on how, when or where this fee is to be paid. In Mexico, get in the left lane. You will be asked by an official where you are going and what you have to declare. If you get a red light you must pull over to the right for an inspection.