What are the four phases of Vehicle Weight & Dimension Reforms?
Phase 1 was introduced in 2001 to address all non-dump semi-trailers with 3 or less axles. Except for some very specialized tankers, all of these semi-trailers had to meet SPIF standards by January 1, 2006 or incur a 3,000 kg reduction from their allowable gross weight. This reduction will increase to 4,500 kg in 2011 or 2021 depending on semi-trailer body style. Phase 2 was introduced in mid-2002 and addressed end-dump and open hopper dump. Any of these trailers built after 2002 must meet SPIF standards, or operate at reduced weights. All such trailers built prior to 2003 are grandfathered and may continue to operate for their reasonable operating life. Also as part of Phase 2, it was determined that the special, more restrictive method of calculating allowable gross weights for aggregate vehicles was no longer necessary for tractor-trailer combinations that meet SPIF standards. Phase 3 was introduced in 2005 to address all non-dump semi-trailers with 4 or more axles and all double tr
