Closely Watched Trains (1966) is available for online streaming at Hulu.com with their $7.99 / month HuluPlus subscription.
Criterion.com/Hulu has a linked directory for 600 Criterion classics, including this film, that are available at Hulu.com.
This film is also available as a DVD at Criterion.com.
I found this title with english subtitles available from http://www.ebay.com/itm/Ostre-Sledovane-Vlaky-Closely-Watched-Trains-DVD-1966-Oscar-winner-English-sub-/130981280605?hash=item1e7f17bb5d
this dvd is also available from czechmovie.com
There is one benefit now – one that can save you a chunk of cash. At the
czechmovie.com, you can buy any film at a 15% discount with the discount code FREE15!
http://czechmovie.com/d/ostre-sledovane-vlaky-closely-watched-trains-dvd-1000030/