This is the final weekend for early voting on Gwinnett County’s  MARTA referendum before Election Day on March 19.

>> READ MORE: Gwinnett's MARTA referendum: a comprehensive voter's guide

The elections office and seven satellite locations are open Saturday and Sunday from 7 a.m. to 7 p.m.

If you can’t make it this weekend, you still have Monday through Friday for a last chance at early voting before Election Day.

To aid with early voting, the county offers residents an online tracker to view wait times at all eight polling locations. The tracker is updated every 60 minutes or more often depending on the need.

Thousands of county residents have already voted to determine the fate of Gwinnett’s pending contract with MARTA . If approved, county residents and other shoppers would pay a new 1 percent sales tax until 2057.

The sales  tax collections, estimated at $5.5 billion, would fund a range of transit programs including the extension of heavy rail from the Doraville MARTA station to a new multimodal hub planned for the area near I-85 and Jimmy Carter Boulevard.

>> READ MORE: Questions about Gwinnett MARTA vote? 2 informational sessions left

Contractual agreements would call for the sales tax collections to flow to the county, which would then pay MARTA for projects and other expenses.

The county would commit to paying MARTA 29 percent of the sales tax proceeds for the first six years. Those funds would go toward general costs of maintaining the larger MARTA system as well as costs related to MARTA’s takeover and expansion of the county’s current bus system.

Coming Monday in The Atlanta Journal-Constitution and AJC.com: A look at the turnout so far in the Gwinnett vote