The Riyadh Metro project has experienced no delays and is now about 21 per cent finished, with completion likely in 2019, a project coordinator at one of the Riyadh metro contractors told Reuters.

Three foreign-led consortia were awarded contracts to build the $22.5 billion metro system in Riyadh July 2013.

Meanwhile, Saudi Arabia is proceeding with public transport projects as scheduled and companies may face penalties if there are delays, Minister of Transport Abdullah al-Muqbil was quoted as saying by a leading local newspaper on Sunday.

With low oil prices slashing the government's export revenues and forcing it deep into deficit, the finance ministry has said it is trimming expenses, and there has been speculation that the budget for public transport infrastructure could be one victim.

Spanish train maker Talgo said in July that Saudi Arabia had cancelled a $201 million contract for six high-speed trains; neither the company nor the government gave a reason.

Some construction industry executives have reported delays in obtaining payment from Saudi government bodies, though others have experienced no problems and it is unclear if any delays are due to a tight budget rather than to the bureaucratic inefficiencies which are common in the region.

Speaking to the al-Jazirah daily, Muqbil indicated there would be no major cutbacks to transport projects, which the government considers important to limit growth in domestic energy consumption and create jobs.

He said the government had allocated SR200 billion ($53.3 billion) to be spent on public transport plans in cities with the highest population densities. He did not specify a time frame for that spending.

"Whether it is public transport projects or trains...the schedule of execution has been set by the Council of Ministers...Each project has a specific schedule and its execution is within an identified time frame with no delay," Muqbil said.

"Definitely, no delay is allowed on all the ministry's projects, whether roads or public transport...Violations will be spotted and penalties will be imposed on companies in charge of these projects."

Muqbil said bids were under evaluation to procure and operate buses for a 10-year public transport project in Makkah. – Reuters