Possible Clues:

• Joining lane
• Motorway exit or entrance
• Driver's way off shaping solid par
• With no time tips load off across right part of motorway
• Cock-up — general initially missing part of motorway complex
• Mistake way driving on this?
• Motorway access from Petticoat Lane?
• Field includes this measure round middle of contraflows -- a motorway feature?
• Motorway access
• Motorway exit/entrance