STK = Single Track Kilometre - that is, one kilometre of wired single track. Includes Network Rail routes only; trams, metros, high speed rail and heritage / tourist lines not included. STKs are current installation; historic STKs and removed/closed schemes are not included.
Voltage |
Line In Service |
Line to Upgrade |
New Line |
|
|---|---|---|---|---|
| Not Electrified | ||||
| Overhead Line | ||||
| ≤600V | ||||
| 750V | ||||
| 1.5kV | ||||
| 25kV | ||||
| Out of Use | X | X | ||
| 3rd rail | ||||
| ≤550V | ||||
| 600V | TBC | TBC | TBC | |
| 630V | ||||
| 660V | TBC | TBC | TBC | |
| 750V | ||||
| 4th rail | ||||
| 630V | ||||
| 750V | ||||
| Dual Electrified: Overhead Line & 3rd Rail | ||||
| 25kV/750V | ||||
| Dual Electrified: Overhead Line & 4th rail | ||||
| 25kV/630V | TBC | TBC | TBC | |
| 25kV/750V | ||||