This from the WADOT web-site:

Seattle/Bremerton Route Beginning Sunday, August 12, the 188-car MV Walla Walla will be replaced by the 144-car MV Kaleetan on this route. The Kaleetan carries 500 more passengers than the Walla Walla. We encourage our customers to walk on during the I-5 construction, parking on either the Bremerton or Seattle side to simplify the commute. We are also setting up temporary three person carpools to ease loading for our Bremerton commuters.

The ferry terminal is north of where I-5 north-bound is being worked on. Why would anyone who would take their car on the ferry (or need to drive on because presumably they would have to drive to their destination once in Seattle) decide to walk on to avoid the congestion on north bound I-5? This line of thinking from the ferry system is mind-boggling. They have already switched to a smaller ferry that does runs at 7:30 am and 5:30PM (you know, one of the main commuting runs) in the middle of the high-travel summer. Now they are switching out the second ferry to a smaller car ferry because they think it will encourage more people to walk on. If you need to drive, you need to drive. All a smaller ferry will do is clog the already congested terminals during the high travel summer season.

Genius WADOT, sheer genius.