Gwinnett County will ask the state for $12.4 million to help upgrade its transit system.

Last week the county Board of Commissioners approved plans to seek seven grants from the State Road and Tollway Authority. The grants would help replace 28 local transit buses and buy 5 additional buses to expand service.

The money also would help improve the Sugarloaf Mills park-and-ride lot and resurface the Indian Trail Road and Hewatt Road lots. It would help build two new lots along Ga. 316 to serve the Lawrenceville and Dacula areas. And it would help replace the transfer center at Gwinnett Place Mall.

Gwinnett would pitch in $3.4 million for the improvements.