I watched a feud over a shared driveway for 3 years when we lived in Watertown NY. The neighbor in the red brick would park on her half near her front door because husband was in Iraq and she had 5 kids.
The other neighbor had a teenage daughter that would park right next to the lady w 5 kids car. When her mom wanted to leave for work she would go over to the lady's home w 5 kids and ask her to move rather than her own daughter that was parked on her side of the shared driveway.
Ultimately a fence solved this nonsense.