Sun Tran will limit public smoking at three transit centers by the end of the month.
The bus service will designate smoking areas at the centers that are separated from public areas and bus entrances.
"Encouraging smokers to use the designated areas will allow for a healthier environment at our transit centers and for more people to enjoy riding the bus," said Sun Tran general manager Steve Spade in a statement.
The change will go into effect July 30 at the Ronstadt, Laos and Tohono Tadai centers.
