Tunnel Lokomotives
     
  Weight range: 20-27 tonnes
Engine power: 140-180 kW

Compact design
Most common for many tunnelling projects
Used in large quantities:
- Gotthard Base Tunnel (Switzerland)
- Channel Tunnel Rail Link (UK)
- Metro Esfahan and Shiraz (Iran)
- Deep Sewer / Circle Line (Singapore)
Tunnel Locomotive
 
Tunnel Locomotive