The sunglasses that John Travolta wears in the movie The Taking of Pelham 123 are Oakley Square Wire sunglasses.

These Oakley sunglasses come in several different color combinations and the exact combination of the movie sunglasses is not yet known, but it looks like the Polarized version with Brushed Chrome frame and VR28 Black Iridium lenses (color code 12-878) or the Tungsten iridium polarized lenses (12-924).

Reference: Oakley Square Wire - Color: Brushed Chrome frame and VR28 Black Iridium lenses (color code 12-878)