extracting the road pattern from satellite images

My project work is extracting the road pattern from images. I applied houghlines to detect the lines and got the start and end points of all the lines. I applied delaunay and voronoi diagram for it. I could see the points in the voronoi regions.if i connect the points i will get the pattern of the road. What technique should be applied after this. https://docs.google.com/file/d/0B7W9pCpzX8fTSnQ3OE5FWlc0VzA/edit . this is the last output i have got. Is it possible to connect all the points and form a pattern . I don't want it to be exact. Even approximate will be enough.Please help me. I have to complete the project urgently. My techniques ia almost same to the this work http://ijarcsms.com/docs/paper/volume1/issue7/V1I7-0030.pdf please tell me how to proceed. Advance thanks

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency