You can have a look at

http://gmaps-utility-library-dev.googlecode.com/svn/tags/contextmenucontrol/

where that what you want to achieve is all done with one GDirections
object. It's surely possible to do the same with left clicks on the
map instead od right clicks. (But then you have to eject the info
windows.)



> am I wrong with this second approach?

No, thats the default way. Another way would be to store the existing
route and add the new route to the existing one. But I'd think the
Google servers are fast enough to safely do it the default way.

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