|From:||Victoria Street (NO458510)|
|To:||Market Street (NO457512)|
|Length:||0.2 miles (0.3 km)|
|Meets:||B9128, C77, C81|
|Route outline (key)|
The C78 starts at a TOTSO on the B9128, Victoria Street in Forfar and heads north to the crossroads with Market Street, the C77. At the same junction, the C81 continues north into the industrial estate, and there is no obvious reason why it was given a different number.