Changes

Absolute Block is a method of signalling for controlling the passage of trains over a double track railway. This system ensures that only one train may be on each track in a section at any given time. The only section of the current SVR controlled this way is the main lines between [[Bewdley North signal box|Bewdley North]] and [[Bewdley South signal box|Bewdley South]] signal boxes. The original Severn Valley Railway was built as a single track railway, and was mainly worked using [[Single line working using tokens | tokens]], although short sections of double track at stations such as [[Stourport]] were worked using Absolute Block.