Starting today, light rail will be running in the bus tunnel–to test the system before Link starts operating in July. From Sound Transit:

Here are some things to know about tunnel operations during the next two months:

• Buses will continue to stop in the same locations at each of the five tunnel stations. Customers will board the bus at the same bays;
• Light rail trains will not carry any passengers until July 18, but will be stopping at mid platform to simulate boarding during the weeks leading up to the launch. Initially trains will be arriving every 10 minutes in each direction at every tunnel station except Convention Place;
• Buses and trains traveling in the same direction will be controlled by a signal system that is designed to keep a safe distance between the vehicles;
• There could be some slight delays in bus service, as bus and rail staff become more familiar with using the new systems in real time;
• Basic tunnel safety is still important. Never cross the tunnel roadway. On the platform, stand behind the yellow safety strip. Be careful of gaps between the platform and vehicles when boarding and exiting buses. If there is an emergency, which requires exiting the tunnel, use the stairways located in each station. Do not use the elevators or escalators, because they will be shut down in an emergency; and
• Starting Saturday, May 30, the DSTT [Downtown Seattle Transit Tunnel, that is] will be open from 5 a.m. to 1 a.m. weekdays and Saturday, and from 6 a.m. to midnight on Sunday for all current tunnel bus routes. When the DSTT is closed, tunnel bus routes will operate on Second, Third, Fourth or Fifth avenues in downtown Seattle.

I won’t be at the press conference this morning, and I’m thinking I should probably avoid the tunnel altogether between now and July 18th. I might just lose my mind and actually try to board one of those trains.