Truckers in southwestern Newfoundland are demanding greater changes in Marine Atlantic's commercial reservation system. (CBC)

Independent truckers protested Wednesday outside a Marine Atlantic terminal in southwestern Newfoundland, in a bid to force changes to a commercial booking system.

Members of the Independent Truckers' Association distributed pamphlets to ferry users near the Marine Atlantic terminal in Port aux Basques, while complaining about a controversial reservation system that the Crown corporation introduced in March but revised just this week.

Organizer Tony Cole, a driver from the central Newfoundland town of Botwood, said new changes that Marine Atlantic announced Tuesday show the Crown corporation is at least acknowledging the problem, but will not solve it.

"They keep saying that their reservation system is working fine, [that] nobody's got any problems with it," Cole told CBC News.

"We're sending our message that it's not all fine, it's not all great. It's not working for everybody."

Truckers set up a protest late Wednesday night by a westbound lane of the Trans-Canada Highway.

Cole said more than 20 trucks were participating in the protest.

RCMP have warned motorists to expect delays in the area around the terminal.

The move came hours after Marine Atlantic revised a contentious booking system for commercial traffic across the Gulf of St. Lawrence.

Although the Crown corporation said the new changes should address complaints about mass bookings and last-minute cancellations, independent truckers are unsatisfied with the revisions, which take start taking effect next week.

RCMP have been monitoring the protest.