|To:||Land's End (SW472302)|
|Length:||9.6 miles (15.4 km)|
|Met (1923):||A30, B3312, B3314, B3317, B3316, B3306, B3315, unclassified|
|Now part of:||A30|
|Route outline (key)|
The B3313 is described in the 1922 Road Lists as Penzance - Land's End, thus making it the westernmost classified road in England.
On 1st April 1925, the A30 was extended westwards to encompass this route. The section in Penzance is now bypassed but the remainder of the route retains this number.