Idling and parking across driveways

There is single yellow line across the front of the driveways(130/128/126 St John’s Road). Please can it be repainted. Parents for Gumley House school continue to park across the driveways here. Sometimes waiting half an hour or more for their kids. They idle outside the houses which also causes pollution. Especially to those living there. I think a more distinct yellow line and no parking sign would encourage them not to park across driveways.