At the 1:30 p.m. work session Tuesday, commissioners will hear a progress report from the Cobb Citizen Oversight Committee, which is reviewing county operations for improvements.
The vote on the CCT routes will take place at the 7 p.m. meeting.
If approved, service on Routes 35, 65 and 70, including paratransit service for disabled riders associated with those lines, will stop on Aug. 1.
A fare increase is not being considered at this time.
CCT Director Rebecca Gutowsky said the lines were selected because they were the least used of the system's local routes.
Route 35, for example, costs a little less than $1 million to operate and has an average daily ridership of 313, while Route 30, which runs from the Marietta Transfer Center to MARTA's Holmes Station in Atlanta, has a daily ridership of about 3,000.
Route 65 has an average daily ridership of 481 and travels from the transfer center to Johnson Ferry Baptist Church and, on peak hours, to the Dunwoody MARTA station. Route 70, which goes from Cumberland Boulevard Transfer Center to County Services Parkway, has an average ridership of 462.
Cutting the three lines and the paratransit service associated with each route will save the county about $2.4 million, CCT Director Rebecca Gutowsky said.
"There are two sides: the operating side and revenue side," she said. "The operating costs go down, but you also lose ridership revenues from fares. So it's not quite a $2.4 million in savings, but the budget won't be as big."
Of the CCT's $18.4 million budget for 2011, about 25 to 30 percent is funded by fares, which are $4 for express bus and paratransit and $2 for one-way local routes. The rest of the budget is subsidized by taxpayer money.
In April, commissioners revised the 2011 budget and mandated 10 percent cuts to all departments, including CCT. Because of federal regulations, the agency had to conduct several public meetings and hear feedback before recommending service cuts or fare increases before the changes could be made.
A total of 141 people submitted comments during the public hearing timeframe.
If approved, the cuts will affect about 500 paratransit users.
"That includes those that live in the areas with service or travel into those areas," Gutowsky said.
CCT will be notifying all riders of the service cuts by posting notices on buses, transfer centers, at bus stops along the routes and on its website.
Chairman Tim Lee said the cuts were likely to be approved at the meeting, but steps would be taken to help those affected.
"We're going to reach out to every single person who uses the paratransit system to help them find options," he said.
Gutowsky said some of the paratransit users will qualify for other public programs for disabled riders or through private companies.
Paratransit riders affected by the cuts who need assistance finding new transportation can call (770) 528-1679.
Started in 1989, CCT has 16 local lines, which run along surface streets, and eight express bus lines that travel during peak hours
Paratransit uses smaller buses to serve people with certified disabilities who cannot use the fixed-route system.