The B3403 is a short link road in Farnborough. Owing to its short length it is not known when the road got its number but it was definitely in existence by the mid-1950s.
The road starts at a roundabout on the A3011 and heads north along the dead-straight Alexandra Road. We pass shops to begin with but the road soon becomes residential. There's a roundabout halfway along and another at the northern end of Alexandra Road on the edge of the grounds of Farnborough Tech. The B3403 turns left here and ends almost immediately at traffic lights on the A325.