The I-10 West Extension would run from the state capitol west to Interstate 17 before turning north to the interchange of Interstate 10 and I-17 ("The Stack"). Then the line will turn west and continue down I-10 in the median past 43rd Avenue. It will then go over the westbound lanes of I-10 to continue alongside the highway to the 79th Avenue/I-10 Park-and-Ride, adding  and 11 stations to connect the West Valley and ease congestion on Interstate 10.
The I-10 West Extension would extend from the state capitol west to Interstate 15 before turning north to the interchange of Interstate 10 and I-15 ("The Stack"). Then it will turn west and continue down I-10 in the median past 43rd Avenue. It will then cross over the westbound lanes of I-10 to follow alongside the highway to the 79th Avenue/I-10 Park-and-Ride, adding and eleven stations to connect the West Valley and ease traffic on Interstate 10.