Table 3.

Illustrative quotes for manager interviews.

No.	Quotes
Q41	“Heat is harmful…we remind drivers to have good rest and avoid alcohol the day before if there would be a heat alert…” (Safety insurance department officer)
Q42	“Some aged driver had a heart attack when they were driving…stop the bus immediately…send him to the hospital…” (Operation department manager)
Q43	“Drivers’ performance can be influenced by their mood to a large extent…they are more likely to be agitated in hot weather…and you’ll not expect a pleasant ride…” (Bus team leader)
Q44	“Frankly speaking, money is the major problem…air-conditioned bus is way more expensive…” (Technical maintenance personnel)
Q45	“We want to purchase more air-conditioned bus…It’s healthier for them…” (Operation department manager)
Q46	“We expect specific policies or regulations from the government to increase drivers’ welfare…” (Bus team leader)
Q47	“Drivers get physical examinations once every two years…according to their health records…you might think heart disease happens to old people only, but you are wrong…” (Medical practitioner, doctor)
Q48	“We handed out some tips to help them better coping with heat…downloaded from the internet…” (Medical practitioner, nurse)
Q49	“In case of emergency while driving, professional guidelines should be provided to our drivers…” (Medical practitioner, doctor)