To that end, these are the 10 most common reasons for failing the driving test. Observation at junctions (11.9% Fail) Use of mirrors (8.2% Fail) Inappropriate speed (5.1% Fail) Steering control (4.7% Fail) Reversing around a corner (4.3% Fail) Incorrect positioning (4.2% Fail) Moving away safely (4.2% Fail) More items… • Sep 8, 2015