Transportation Department 10156 Highway 3 Plain Dealing, LA 71064 Phone : (318) 326-5540 Business Category Port Authorities Development Department 10156 Highway 3 Plain Dealing, LA 71064 Phone : (318) 326-5540 Business Category Administration Of General Economic Programs Louisiana State Of--transportation & Development Department Of, Maintenance Unit Highway 3 N Plain Dealing, LA 71064 Phone : (318) 326-5540 Business Category Government Offices-State Government Offices State & Local Government Offices & Public Schools