Convert to cycle lane
Convert some of the pavement along Niddrie Mains Rd to a proper segregated cycle path. The pavement is already very wide, and east of Craigmillar Castle Av it already almost looks like a cycle path as there is an additional kerb in the middle of the pavement, dividing it into two 2m wide paths.
It would need a few dropped kerbs and repair of a few potholes, but other than that it could be easily converted into a cycle path. Many people cycle on there already (illegally).
It is important because Niddrie Mains Rd is very busy, often jammed, with many pinch points that lead to dangerously overtaking.