WORKERS have complained about Bechtel cancelling two of its bus routes that carry employees to the ferry terminals from Benaraby and Mt Larcom.
In an open letter the workers said they now have to find their own way to the terminal.
But Bechtel said the routes were being dropped because of a lack of passenger numbers and those affected were provided with alternative pick-up points a short drive from the original location.
Bechtel provides the free service to employees at an annual cost of around $13million as part of its commitment to reduce traffic impacts on roads and car parking overflows at the projects' ferry terminals.
A letter seen by The Observer written by an employee said the employees would "have to either find their own way to the terminal at their own cost, or run the risk of not having a seat to travel upon from a Boyne Island service some 8.8km further up the road and park illegally on Ergon property".
"The funny thing is that they clain (sic) to have a full car park at the port, and even though this services being cut weren't at full capacity, they haven't ensured there was enough personnel assigned to them," a worker wrote.
Bechtel Gladstone general manager Kevin Berg said they currently had 75 buses carrying about 2000 employees every morning and afternoon across a series of routes throughout Gladstone and the outlying regions.
"As with any bus service, our routes are changed to make best use of the service," he said.
"Unfortunately that means that some employees may have to travel a short distance to their pick-up point."
Mr Berg said both services averaged between four and eight people per trip and were simply not sustainable at that level.