Where will riders use the ST3 Link system in 2040? Longtime readers will be familiar with project ridership estimates, but most riders on Link are not going to the ends of the line. Along any line, ridership can be much higher on some segments than others. The suburban lines have weak ridership at the tails. Even the Seattle ST3 extensions have lower ridership outside of downtown than is widely understood.
The busiest part of the system is, of course, downtown Seattle with about 200,000 daily riders expected across both tunnels. Near downtown, the largest number of riders will traverse the North Line (about 108,000 daily riders near Northgate), the South Line (72,000 riders near Tukwila), and the east (65,000 riders crossing Lake Washington).*
Ridership to downtown Seattle from the ends of the Ballard and West Seattle extensions are smaller. West Seattle Link will carry 32,000 over the West Seattle bridge. Ballard Link has 34,000 riders on the segment west of Seattle Center. Taken together, this is scarcely more than the East Link ridership across Lake Washington.