Austin may not be the biggest city in Texas, but it's impressive. Once you're here I-35 runs north and south through the middle of Texas so you can take your Car Rental anywhere in the state. If you're in a hurry, check out the new toll-road just out side of town where the speed limit is 85 miles per hour! The city hosts internationally famous events such as SXSW Music, Film, and Interactive festival and Formula 1 racing and during this time in influx of tourists and traffic can increase drastically.