The reality is that it may seem to be narrow, but in fact it’s wide enough. For example: An urban residential street like Hillview Crescent, Timaru. People do not want vehicles to go fast in residential areas where kids may be playing on footpaths etc. The only way to reduce the speed is to narrow the lanes so that we get the “side friction” that naturally make drivers go slower because the space seem to be tight. Below is a diagram of such a road.
As shown, there are still plenty of space for even large vehicles to come through with ease.
The width of a car is about 1.8 m and maybe 1.9 m for a large SUV. A bus and truck is about 2.4m to 2.5m wide.