CINCINNATI, OH (FOX19) - Cincinnati's streetcar system resumed service at 6:30 a.m. Monday after it was halted last week.
Extreme cold cause the Cincinnati Bell Connector to experience mechanical issues, city officials say.
As temperatures dropped to the single digits, all five streetcar vehicles were halted due to mechanical problems.
City Manager Harry Black called the malfunctions "unacceptable" in a memo to the mayor and city council.
The city is refusing to pay $4 million in bills to the streetcar manufacturer until all vehicles are "in full working order," Black wrote.
"Four of the five vehicles have received repairs, including periodic maintenance, brake work, inspections and other warranty related repairs," a Metro spokesperson wrote in a statement released Sunday.
The fifth streetcar vehicle is out of service due to damage in a collision Friday.
A car crashed into the streetcar as it performed a test run at Liberty and Elm streets.
Two operators suffered minor injuries and the driver of the car was cited by police.
The recent mechanical failures aren't the first issue to plague the Cincinnati streetcar.
Riders have complained of major delays and ticketing problems since its September 2016 opening.
On top of that, ridership numbers are not living up to expectations.
Daily ridership numbers provided by SORTA show a nearly 44 percent decline between the last three months of 2016 and the last three months of 2017, according to a report from our news partners at the Cincinnati Enquirer.
"It's been kind of a nightmare. It's like Murphy's law - when everything can go wrong and it has. We will win the battle. First, we have to get the cars straightened out," said Cincinnati City Councilman David Mann.
Most of the recent issues are related to the air compressors, which are required for the safe operation of the vehicles.
The air compressors operate the sanders, which are essential in decelerating the vehicle in slick conditions.