Kalos Route 2 is seen at a snapshot at the official website of Pokémon X & Y. It is most likely the second route in the Kalos region.
Kalos Route 3
Kalos Route 3 is seen at the first trailer. If you look at the first trailer and the screenchots from the official website you ca see that this Route looks different from the first trailer, for example having more trees and more detaied plants, rocks, etc. This may be because they are still working on the desings of the overworld. It is most likely the third route of the Kalos region. This Route connects Santalune Forest with Santalune City.
Kalos Route 5
Kalos Route 5 is briefly seen at the second gameplay trailer, where the player is in Lumiose City with a building having a 5 at the entrance in the background, in other words the Gate between the route and the city. Or it could simply be a building with a 5 on the entrance.
This is the second region, both overall and in a row, not to be based on an area in Japan. The first was Unova which was based off New York City in United States.
Similarly, Kalos is the second region to have the routes restart at 1, the first being Unova.
Kalos is meant to be based off France, but the creators took inspiration on other parts of Europe. If you look at the top-left corner of the Kalos region you can see a town with a resemblance to Stonehenge, which is in England, mixed with the Carnac Stones, a group of rocks in France.