Traffic along State Route 520 is slowly returning to normal after a collision early Thursday blocked two lanes near Montlake Boulevard in Seattle. The crash, which occurred around milepost 2, led to extended closures of both the left general-purpose lane and the HOV lane, according to the Washington State Department of Transportation (WSDOT). WSDOT Traffic first reported the incident around 8 a.m., warning drivers to expect significant delays heading westbound toward Interstate 5. By late morning, officials confirmed that both affected lanes had reopened, though congestion persisted well into the afternoon. The cause of the crash and the number of…