by federal standard by federal standard standards for STAA trucks http://ops.fhwa.dot.gov/freight/publ...egs_final_rpt/ http://ops.fhwa.dot.gov/freight/publ...egs_final_rpt/ by federal standard http://ops.fhwa.dot.gov/freight/publ...egs_final_rpt/ FHWA standards for STAA trucks Federal Size Regulations for Commercial Motor Vehicles