>>96784505
Ah, I thought you were trying to press its way down the hallway like a crusher.

" An immobile, vertical curtain of whirling blades shaped of pure force springs into existence. Any creature passing through the wall takes 1d6 points of damage per caster level (maximum 15d6), with a Reflex save for half damage.

If you evoke the barrier so that it appears where creatures are, each creature takes damage as if passing through the wall. Each such creature can avoid the wall (ending up on the side of its choice) and thus take no damage by making a successful Reflex save.

A blade barrier provides cover (+4 bonus to AC, +2 bonus on Reflex saves) against attacks made through it. "

The fact it's a "barrier" or "curtain" rather than a wall implies to me that it's fairly thin, especially because there's no text on what remaining "within" the blades does. I think therefore it wouldn't really impede movement (5 square feet is a LOT of space) unless you were specifically trying to get past the midpoint.

If you're actively fighting I think it'd get dicier because you can't move freely but I think there it'd be easiest to just slap a -2 on attack rolls and call it a day. Let people shove each other back and forth through the barrier.