More than a month after stepping back to recover from pneumonia and leg surgery, Canadian Pacific Railway Ltd.’s chief executive officer Hunter Harrison is waiting for doctors to clear his return to full-time work.

Mr. Harrison said in late July he would hand his daily responsibilities to Keith Creel, chief operating officer, and limit travel between the United States and Calgary while recovering from complications from surgery to improve blood flow in his legs. A CP spokesman said doctors have not yet cleared Mr. Harrison to return to work full time.

Mr. Harrison, who is in his early 70s, flew to Calgary two weeks ago and is working with the company’s leadership, said Martin Cej, a spokesman for CP Rail. He is splitting his time between Connecticut and Florida while keeping tabs on the railway’s operations. “He’s very much involved day-to-day. Things are coming along exactly as planned,” Mr. Cej said.

News of Mr. Harrison’s health troubles in July was followed by an announcement that his counterpart at Canadian National Railway Co. would also take time off to handle medical troubles.

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