The toll to cross Bristol's Clifton Suspension Bridge by car will rise to 50p on Monday, 8 January.
The last toll hike on the historic bridge was in 2003
The hike, from 30p, comes after a public inquiry, and in the face of opposition from the National Alliance Against Tolls.
The bridge trustees argued the rise was needed because of increased insurance charges, the cost of new lighting and the discovery of voids under one tower.
The toll charge for cars last rose in 2003, from 20p to 30p.
John McGoldrick of the National Alliance Against Tolls, said: "It was inevitable that the minister would approve the increase, but it flies in the face of the facts and justice for drivers.
"The trust has been very slow in publishing accounts, but the latest accounts showed that the trust had reserves of £6.5m."