The chancellor, George Osborne, has announced in his Budget that toll rates for the Severn Crossing will be reduced for LCVs from 2018, with the higher band for small vans and buses being abolished altogether.
Currently, car drivers pay £6.50 while small buses and vans weighing up to 3.5-tonnes pay £13.10 to cross between England and Wales.
"The Severn Crossings are a vital link for Wales," Osborne said. "It's a boost to drivers of white vans."
In August 2014, the Freight Transport Association claimed the toll was the most expensive in the country.