Most cities have their sticky points during rush hour. Some places are in permanent rush hour. Las Vegas has a very predictable driving schedule. There are several main thoroughways throughout the valley (see map). The spaghetti bowl tends to be the biggest mess. That's where the I-15 meets the I-95. There is currently construction in the area and that makes the situation worse. Also, where the I-215 and I-15 meet up are a little tight during certain times of the day.