Now to do the Walkway drag out a box in the top view about the size of the walkway and change the length Segs to 3 and the width Segs to 5 (fig.10).
Convert it to an editable mesh then adjust it to fix the background as shown. (fig.11)
fig.10
fig.11
To fix it up some go into vertex sub object mode and select all the vertex in the middle of the object then use the non-uniform scale tool to scale them together in the top view, should be along the Y axis, once that is done weld them together. (fig.12, fig.13)