First: check the identifier
A line may gain a variant, partial service, night prefix or new number. Also search by destination and the neighborhoods served. If the regular service does not appear, a complementary operation may be registered separately.
In BuzuRadar, prefixes are preserved precisely to prevent different services from being merged. This also requires the user to select the correct operation.
Second: check the plan and date
SMTR publishes successive versions of the operational plan. A legitimate change may have taken effect after the file you had saved. Compare itinerary, days of service and start date.
If the plan still shows the line, but it has just disappeared from the map, observe whether other lines continue to update. This helps separate failure from the source of operational change.
Third: identify whether the deviation is temporary
Works, events, accidents and rain can cause deviations for a few hours. In these cases, COR and official communications can explain closures. A repeated and unannounced change deserves to be noted.
Central 1746 accepts reports about improper routing. Provide the operator when known, the route, how often the problem occurs, and the street that is no longer served or is being used instead.