An employee walks past a tram which is parked during a nationwide strike over a wage dispute held by public transport workers on Feb 2, 2024 in Frankfurt am Main, western Germany. (PHOTO / AFP)

BERLIN — Bus and tram stations across Germany were at a standstill on Friday, disrupting millions of commuters and travellers, as 90,000 public transport workers were called on to walk off the job.

The 24-hour strike, called by labour union Verdi in all federal states except Bavaria, is the latest in a series of industrial actions that have plagued the country's transportation sector in recent weeks.

On Thursday, a strike by security staff at 11 German airports had affected 200,000 travellers and led to around 1,100 flight cancellations or delays

Central to Verdi's demands are improved working conditions, it said in a statement, listing reduced working hours and increased holiday entitlement as requested measures.

READ MORE: German train drivers start 3-day strike, bringing near halt

"We have a dramatic shortage of labor in public transport and incredible pressure on employees. Buses and trains are cancelled every day in all fare zones because there are not enough staff," Verdi deputy chairwoman, Christine Behle, said in a statement on Monday.

Youth and climate movement Fridays for Future said 60 of its local branches supported the industrial action.

"We are striking together to mobilize for better working conditions and a future for public transport," a spokesperson said.

On Thursday, a strike by security staff at 11 German airports had affected 200,000 travellers and led to around 1,100 flight cancellations or delays, the German airports association ADV said.

Disruptions were set to continue in Hamburg, where Verdi called on ground service staff to strike from 3 am (0200 GMT) on Friday until midnight.

READ MORE: Union announces strike at German airports, warns of disruptions

The union said it was demanding higher paychecks and a one-time payment of 3,000 euros ($3,247.50) to adjust for inflation.