The truck was doing 135 km/h in a 90-km/h zone on the Trans-Canada Highway, Cpl. Fred Harding said in a release Tuesday.
“The 1995 Chevrolet postal van has been impounded for seven days,” Harding said.
Harding said the contents of the van were transferred to a second postal truck.
Police in B.C. can temporarily impound vehicles alleged to have been travelling at 40 km/h or more above posted speed limits.
A ticket for excessive speeding will cost a convicted driver at least $368 and as much as $483.