By about 4:40 p.m., light rail service was back online but trains were single-tracking between BWI and the BWI business park, a Maryland Transit Administration spokesman said. Some wires that power the light rail were damaged when the bus overturned, and it is unclear when service to both tracks will be restored.

A 31-year-old man who was sentenced to 20 years in prison in Baltimore after he pleaded guilty to possessing 5.9 grams of marijuana won an appeal Wednesday invalidating the plea — raising the possibility that he will be released.