Driving on Tracks Permitted
軌道敷内通行可(きどうしきないつうこうか)
Meaning
A sign indicating that motor vehicles may drive within the streetcar track zone (軌道敷). Driving there, which is normally prohibited, is allowed.
Common mistake on the test
Driving within the track zone is prohibited in principle and allowed only with this sign or an auxiliary sign. You must not obstruct streetcars.