Stonehenge in your city

Things I have found worth digging into the history:

- Montreal: http://sztanko.github.io/solsticestreets/cities/montreal.htm...

- Riyadh: http://sztanko.github.io/solsticestreets/cities/riyadh.html

- New York http://sztanko.github.io/solsticestreets/cities/new-york.htm... (although most of the streets in Manhattan are aligned in a different way, see: http://en.wikipedia.org/wiki/Manhattanhenge )

- Old cemetery in Vienna: http://sztanko.github.io/solsticestreets/cities/vienna.html

If anyone knows if the alignment is intentional or that is just because a statistical artifact, please let me know.