The groups had challenged the state's $36 billion regional transportation plan because it didn't include enough mass transit projects.
When they threatened to file a lawsuit seeking to stop the plan from being implemented, Gov. Roy Barnes and other state officials voluntarily agreed to delay transportation projects until the two sides worked out their differences.
Two months of negotiations later, the groups have half-heartedly agreed to accept Barnes' final offer.
"There's enough here -- just barely -- to move the region forward," says Bryan Hager, of the Sierra Club's Challenge the Sprawl Campaign. "[But] they have not made any explicit commitment to increase transit funding."