From the Japanese Wikipedia page:
=> http://ja.wikipedia.org/wiki/東京ゲートブリッジ
- No bicycles allowed
- Pedestrians can cross between 10:00-17:00, in summer 10:00-20:00
At the moment the bridge only leads to a huge island of garbage, although by 2016 that is set to become a huge benzene-flavored woodland park - the proposed venue for the proposed 2016 Tokyo Olympics. (Tokyo Sea Forest, motto: "If you build it, they will film porn there".)That should rule out most all of any potential commuter traffic.... nice.