The transit agency said 179 employees, including 97 bus drivers, are being recalled the first week of November. 

Four employees have tested positive to drugs and alcohol since a random testing policy was implemented on May 8.

The Ministry of Labour has ruled air in the subway is "not likely to endanger" after three "work refusal" situations involving employees.

The Toronto Transit Commission is forging ahead with a plan to begin random drug testing of its employees after approving the move at a board meeting on Wednesday.