Gephyrophobia - Fear of Bridges.

Gephyrophobia is an anxiety disorder brought about by the fear of bridges. As a result, sufferers of gephyrophobia may avoid routes that will take them over bridges.Fear of bridges is a relatively common phobia although most people with it do not know they have something called "gephyrophobia." However, the derivation of the word "gephyrophobia" is perfectly straightforward (if you know Greek); it is derived from the Greek words "gephyra" (bridge) and "phobos" (fear). link