Variable message sign
A gantry structure spanning the road with electronic signals over each lane and a large MS4 message sign on the left.
A 50mph speed limit is shown over all lanes, except the left lane which has a "move left" arrow. The message "stranded vehicle" is shown.
It's ten miles from the services to the next junction, which isn't an enormous distance but is still an unusually long gap for a UK motorway. Luckily there are now all these signals to keep you interested.