Does anyone have any references or sources I could refer to on the use of alternative road reserve widths in layout planning - i.e. moving away from standard widths prescribed by Transport Engineers / Planners to something narrower?
For example, in Cape Town we require a 10m (32 foot) road reserve, which accommodates a 5.2m (17foot) "blacktop" and 1,75m (5,7foot) surfaced sidewalks either side. Splays are generally 4,5m (14.7 foot). This results in very large areas of wasted space, and undesirable setbacks for dwellings from roads, particularly in low-cost housing projects.
I am in need of research that supports / motivates reducing these standards.