Sorry, but the way they refute is is to say "the street does not extend to a point" yet you can draw the symbol on the streets and see that the design is perfectly implied.

http://maps.google.com/maps?q=washington+dc&hl=en&ll...

I also assume you're not a Mason, thus you think that everything is simply coincidence.

Sorry - but there are very deliberate decisions, particularly with respect to design, that are, in fact, Masonic, all over DC.