A fourth public meeting on Hall County’s update of its 2040 transportation plan has been postponed. “Since Hall County is part of the Atlanta air quality nonattainment area, we need to coordinate with the Atlanta Regional Commission for air quality as part of our plan update,” said Sam Baker, senior transportation planner for the Gainesville-Hall Metropolitan Planning Organization. “We have postponed the meeting to a later date when we will have results of emissions analysis from ARC.” A date has not been set for the meeting, Baker said.