The free ride on the new Port Mann Bridge ends in a few weeks.
Part of the incentive when signing up for an account to use the newly tolled span was 20 free crossings.
That offer expires at the end of May.
Greg Johnston with the Transportation Investment Corporation says most people by now have used up all the freebies.
Those who haven't by May 31 are out of luck.
However, there's another incentive being offered to attract motorists.
"If unregistered drivers chose to (finally) register or sign up for TReO, we are offering two free trips as an incentive to do so."
TReO is the system that records the cars that cross the bridge and charges the driver by scanning the licence plate.
The introductory rate of $1.50 per crossing ends in December. After that, the toll will double.