Possible Clues:

• You cannot make a comeback along this street
• This street allows only single traffic flow
• Perhaps unrequited love experienced for the first time, yes?
• Arrow words
• Revolutionary ace in utterance to grab attention permitting no U-turn
• Allowing only a single direction
• Words next to an arrow downtown
• L.A. Guns: "I took a ride with her ___ ticket to love"
• Single, appearing for the first time, extremely arty, after love ...
• A method for dealing with traffic?