Almost 30 buses may be cancelled today in one of the worst days for disruption since the Department of Infrastructure announced it was having problems a month ago.
On Facebook, Bus Vannin says staff shortages and illness means it's expecting disruption from just after 10am until past 11pm tonight.
Services to Peel, Port Erin, and Port St Mary are likely to be hardest-hit.
This week, Infrastructure Minister Tim Crookall said he didn't know when the driver shortage would be resolved.