Staff and patients at Ninewells Hospital face climbing up to eight flights of stairs because operators have switched off the lifts at the multi-storey car park.
Complaints have been made by motorists, who have had to climb the steps after 10pm because the lift systems are being stopped.
Indigo, the company responsible for managing the site — one of only three in the country still charging users — said they do not staff the building after 10pm, meaning the devices are switched off. It is understood the changes came into effect last week.
Shelagh Wilson, a theatre nurse in the hospital’s anaesthetic department, was faced with an eight-floor climb after finishing a 12-hour shift.
Mrs Wilson said she tried to get in a lift at 9.50pm, having had to park on the uppermost floor earlier in the day because of limited available space, to be told by employees they had been turned off for the night.
She said: “It can take as long as half an hour some days to find a space, so very often those of us whose shifts start at lunchtime can only find space on the upper floors.
“It’s a safety and an accessibility issue. Staff who work very hard or are on call will now face having to climb a lot of stairs late at night.
“Also, some visitors might be seeing relatives in hospital later on in the evening and may themselves not be all that mobile. It’s unfair and not right. It is unacceptable.”
The car park costs users, including all staff and patients, £2.20 per visit and has been dubbed a “tax on the sick” by politicians.
A spokesman for Indigo did not comment on Mrs Wilson’s complaint, but did confirm because of the car park being unmanned, lifts are turned off after 10pm.