California Department of Transportation
   Caltrans > Division of Maintenance > Structure Maintenence > Posting and permit rating codes
Bridge Posting Codes
B Open - posting recommended
D Open under temporary conditions
E Open - temporary structure
G New structure - not yet open
K Closed to all traffic
M Closed or partially closed pending repairs
J Posted for load
R Posted for other load-capacity restrictions
Permit Rating Codes
P Purple permit capacity
G Green permit capacity
O Orange permit capacity
X No permit capacity