If I remember correctly, the signs direct commercial trucks and traffic to the right and the truck lanes go around (to the west of) the custom office building to special truck lanes.
The lane directly to the left (east side) of the office building is usually marked "buses only". The remainder of the lanes to the left of the bus lane are usually marked Car/RV, although sometimes the lanes all the way to the left are marked cars only - no trailers.
Hope that is some help. ....
Bill & Kate - Stone Harbor, NJ
w/ Bailey (standard poodle) and Zeke (partipoodle)- both rescues
2018 Ford F-250 Super Duty Crew Cab w/ 6.2L gasser
2014 Forest River Wildcat 272RLX fifth wheel