To be added later...
Excellent day of plenty of climbing and descending.  The D912/D512 portions (the bulk of the ride) had some traffic, but not much.  The portion from Chambéry to the Col du Granier was filled with local riders taking advantage of this Sunday with perfect weather.  After that, there were only a few riders until getting close to Grenoble.  The descent from the Col de Porte (1326 M) was long and steep.  Make sure that your brakes are working properly.  And when arriving at the first overlook high above Grenoble, the view was really something.  Within Grenoble itself, there were plenty of bike paths.
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