| No information | |
| Not electrified | |
| De-electrified | |
| Electrification proposed | |
| Electrification under construction | |
| Overhead line | |
| 3rd rail | |
| Voltage | |
| Less than 750V = | |
| 750V = | |
| 750 – 1000V = | |
| 1kV = | |
| 1 – 1.5kV = | |
| 1.5kV = | |
| 1.5 – 3kV = | |
| 3kV = | |
| More than 3kV = | |
| Less than 15kV ~ | |
| 15kV 16⅔Hz ~ | |
| 15kV 16.7Hz ~ | |
| 15 – 25kV ~ | |
| At least 25kV ~ | |
| 25kV 50Hz ~ | |
| 25kV 60Hz ~ | |