Investigate why dots are overlapping the Google Map display

[jdalbey]

Ideally there should be two dots adjacent, as in the ATMS client.

[jdalbey]

They are overlapping because they are really close together. For the simulation, we don't really need them to be that close, so we'll just eliminate one of them from the data file.

We NEED two dots at each point to show separate colors for each direction, in the event one direction is free flowing and the other is congested.

[jdalbey]

Solved, committed in r271. The postmile file is preprocessed (code not committed yet) to determine the unit vector perpendicular to the highway at each dot. Then when the map is zoomed the dot is redrawn at an appropriate distance from the highway, so the pair of dots appear side-by-side.