Related Clues:
- Not allowing reverse motion
- Perhaps unrequited love experienced for the first time, yes?
- Revolutionary ace in utterance to grab attention permitting no U-turn
- Like non-return valve
- Not allowing return motion
- Allowing motion in a single direction
- Allowing no return movement
- By way of informal drive, avoiding street
- Traffic sign with an arrow
- Nothing modern ever appears in this kind of street
- You cannot make a comeback along this street
- No traffic is met in such a street
- The only means to ease traffic congestion
- Nothing different -- always moving in a single direction
- Individual means 'not reciprocated'