"An ARB investigation showed that MTS failed to meet transit fleet vehicle requirements, and did not inspect their heavy-duty diesel vehicle fleet," according to a statement issued by the state regulatory agency.
Rob Schupp, an MTS spokesman, said the majority of the fines are due to late testing on diesel buses and other vehicles.
"They passed the test, we just missed our deadline," Schupp said.
According to Schupp, only 97 of MTS' 551 vehicles are diesel, and most if not all, will be replaced in the next two years.
"We've got one of the cleanest fleets in the nation," he said.
A ribbon-cutting ceremony was held Tuesday to celebrate the opening of a joint-use park at McKinley Elementary.
A vote is expected Tuesday as the Del Mar Fair Board considers transforming the Surf Side Race Place into a new indoor entertainment venue.
The San Diego City Council Tuesday formally approved a $225,000 settlement in litigation brought by a deputy city attorney, who alleged sexual harassment by her former supervisor.
The Gate Fire, which has burned about 2,056 acres northwest of Dulzura, was 95 percent contained Monday. Cal Fire also reported that all evacuation orders and warnings were lifted in the fire area.
The Gate Fire northwest of Dulzura has been fully contained. Cal Fire says its crews will remain on scene Tuesday mopping up and guarding against flareups.
The North County Transit District (NCTD) has voted to lay off its enforcement officers that patrol local train and bus stations.
It'll be mostly sunny in the majority of San Diego County Tuesday, once the morning clouds and fog clear.
The North County Transit District (NCTD) has settled a high-profile lawsuit with a former employee for nearly $100,000.