> Emergency vehicles need a grid of arteries with two lanes in each direction so cars can pull over in normal traffic conditions to let them through. I've seen

> Emergency vehicles need a grid of arteries with two lanes in each direction so cars can pull over in normal traffic conditions to let them through. I've seen emergency vehicles handle two-lane roads (i.e. one lane per direction) well by having drivers in both directions pull over to the edge of their lane and driving in the middle of the road. An alternative setup that does not require four car lanes is what is in front of my house: A four-lane road where the outer two lanes are for cars and the inner two lanes are for trams only. Emergency vehicles use the tram lanes as required. Makes it much nicer to cross as a pedestrian, too, since you're only crossing single car lanes at a time.