Possible Clues:

• Block that is to restrict motorway progress
• Grim passenger accepting situation in which further progress is impossible
• Stalemate situation
• My admission of being dated produces standoff
• Puck's old hat? Deadlock ensues ...
• Uncompromising situation?
• I refuse to accept the modern deadlock
• Negotiators might reach one
• Deadlock that is about politician and fool
• Standstill that is to limit motorway progress