A delivery driver made two types of deliveries: local and express. For local deliveries, the driver traveled miles at an average speed of 30 miles per hour. For express deliveries, the driver traveled miles at an average speed of 60 miles per hour. The total distance covered was 180 miles. If the driver spent the same amount of time on local deliveries as on express deliveries, what is the total number of miles traveled for express deliveries?
60
90
120
150
