If it is the iron railing, you can also climbing over the wall out, if it is such a Watergate, how you will do.

Designer Michael Tatschl, Sascha Mikel and Martin Schnabl, Through the continuous flow to prevent people through.

At the same time, faced the risk of accidents (such as life-threatening), it can also to escape through the water.
If necessary, he could allow various convenient (such as bicycles, tricycles, wheelchairs) through.

The use of video, the following are the other two plans: