Just in from SDOT:
On Wednesday, March 2, the City of Seattle will conduct Bus-Only transit lane enforcement (eastbound) on the West Seattle Bridge from 7 a.m. to 9 a.m.
Officers from the Seattle Police Department will be issuing warnings and citations to motorists traveling in violation of posted restrictions that the Bus-Only lane should be used a through corridor by buses.
This is an effort to educate and enforce traffic laws that support transit. With 45 percent of downtown commuters using transit, the enforcement work will help ensure the reliable and efficient movement of transit riders along Seattle’s important bus corridors, and improve safety for all travelers.
Driving in violation of posted restrictions is a violation of SMC 11.53.230 (traveling in a bus only or BAT lane) can result in a fine of $136.
P.S. A few years back, SPD used to send out what it called the Aggressive Driver Response Team and follow it up with stat roundups like this one.