Read the interesting article by Daniel Herriges about sidewalks and I've been thinking about how to turn dirt walking paths into sidewalks incrementally.  Has anyone moved through stages of incremental development with respect to pedestrian transportation?

I imagine it would begin with simply covering the exposed dirt with small-medium size gravel. The next iteration would involve filling any potholes and regrading it to drain to the sides.  The next iteration would widen it to allow two couples walking to pass each other.  Finally, the path would warrant the investment of building a concrete sidewalk.

Also, does anyone have ideas on how to make the intermediate steps better for wheelchairs/strollers?