Motorway gantry sign
A gantry spanning the motorway with blue overhead signs indicating one lane exiting and the other lane continuing ahead, and the following text.
Left lane destinations: M23 s ; Brighton; Crawley; Gatwick [Airport symbol].
Right lane destinations: M23 n; Croydon.
Change Route: M23 Gatwick or M23 Croydon
At the real junction, there are two dedicated lanes for the turn towards the M23 southbound, because it is by far the busier sliproad.