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Add explanation of accommodation bridge, occupation bridge etc
*[[Worcester Road Bridge]] (2)
*[[Wribbenhall Viaduct]] (11)
==Types of bridge and crossing==
'''Accommodation bridge / crossing''': An accommodation bridge or accommodation crossing is one built during construction of a new railway, or other transport route, in order to accommodate a pre-existing private road, path or right of access. Construction of the bridge or crossing is normally at the cost of the route developer as a condition for obtaining the land for building the new route.
'''Occupation bridge / crossing''': An occupation bridge or occupation crossing connects two parts of an estate separated by a railway, road or canal. Unlike an accommodation bridge or accommodation crossing, it is not necessarily installed during construction of the railway or at the route developer’s expense, nor may there have been an existing road or path at its location.
'''Overbridge''': An overbridge is a bridge over the railway, normally carrying a road or track.
'''Underbridge''': An underbridge allows a road, river etc. to pass underneath the railway.
'''Viaduct''': A viaduct is a particular type of bridge characterised by having a number of small spans, for crossing a valley or a gorge.
