Thiruvananthapuram – Kasaragod Semi High-Speed Rail Project

Project at a glance

Name of the ProjectSemi High Speed Rail Project from Thiruvananthapuram to Kasaragod (Named as SilverLine).
Executing CompanySPV of Kerala Rail Development Corporation Limited (KRail)
Project Length529.45 kms
GaugeStandard Gauge of 1435 mm
Operational Speed200 kmph
Travel Time4 hrs (approx.)
Construction Period2020-25 (Five Years)
FIRR5.84% over 30 years and 8.49% over 50 years
EIRR24.04% over 50 years
Type of TrainEMU type train set-9 cars Extendable to 12/15 cars
Seating2+2 (Business), 3+2 (Standard) 675 Passengers in 9 cars train
Ridership79,934 in 2025-26
Power SupplyFrom KSEBL through solar & other renewable energy.
Signal &Comm.ETCS Level 2 with LTE
Stations11 including Kochi Airport
Project Cost on CompletionRs 63,940.67 Crores



Total Length529.45 Kms. (Centre line to Centre line of Stations)
a) Viaduct88.41 Kms
b) Tunnel11.52 Kms
c) Cutting101.73 kms
d) Bank292.72 Kms
e) Cut & Cover24.78 Kms
f) Bridges12.99 Kms
Total Route Length532.185 Kms. (End to End of the route length)
Sl.No.Name of stationChainage(KM)Inter-station distance (KM)Elevated / At grade
2Kollam5535855358At grade
3Chengannur10290047543At grade
4Kottayam13610833208At grade
6Kochi Airport Station21230516998At grade
8Tirur32056561447At grade
10Kannur44609589273At grade
11Kasaragod52945083515At grade

Thiruvananthapuram – Kasaragod: Ridership over different horizon years.
Estimated Ridership Forecast for Different Horizon Years for Thiruvananthapuram – Kasaragod

Passenger. km58,35,18269,11,05697,04,9121,16,03,058
Average Trip Length (km)200200200200

4.1   Underground Structures

4.2   Super structure for bridges, Viaducts etc.

4.3   Viaduct

4.4   Bank Top width

4.5 Cutting bottom width

NATM      method      of      construction.       Cross
Sectional Area 80 m².

Either box Girder or double ‘U’ type girder. Generally, 30m in length.

Supported on single columns generally

12 m


4.6   Track Structure

  1. Mostly ballasted Track for main line except over viaducts & Tunnelswhere ballastless track is used.
  1. Ballasted Track in Depot except washing line and inspection bays.

4.7   Min horizontal Curve Radius

1,850 m

4.8   Min Vertical Curve Radius


4.9   Max Cant


4.10 Permissible Cant Deficiency


4.11 Permissible Cant Deficiency   (maximum)


4.12 Max Gradient

1 in 60

4.13 Distance between Track Centres

4.5 m

4.14 Car Width

3.4 m

4.15 Max. Axle Load of car

16-17 Ton (UIC Loading Standards)

4.16 Width of Track Formation

12 m

4.17 Tunnel Cross Section  (Standard

80 m²

  • Operating Speed: 200 KMPH
  • Maximum Design Speed: 220 KMPH (structures designed for 250 kmph)

The train operation plan has been taken for headway of 15, 15,10 and 10 minutes in the year 2025-26, 2029-30, 2040-41 & 2052-53 respectively during the peak period.

  1. Traction feeding system :     2X25    KV       Auto    Transformer     Type    feeding
  2. SystemCurrent Collection: Over Head Contact System (CCS)
  3. Power Requirements:






    Power demand





    Energy consumption
    (million units)





To start with, 9 car Train with the capacity of 9 car is 675 passengers. This train length can be increased to 12/15 cars in future with capacity of 900/1125 passengers respectively.

  1. Type of Train: EMU with 9 cars extended as 12/15 cars
  2. Train Carrying Capacity: For 9 cars, 675 passengers
  3. Train Length (in meter) incl. auto coupler 9 car train – 225 m (approx.)  :15 car train – 375 m (approx.)
  4. Length of Coach          : 25.00 m (average)
  5. Width of Coach            : 3.4 m(maximum)
  6. Height of Coach           : 4.5 m
  7. Axle Load (T) : Maximum Axle load is taken 16 – 17 Ton for Passenger Train, design proposed as per UIC load.
  8. Coach construction : Lightweight equipment and coach body aluminium body
  9. Propulsion : Traction circuit & configuration: 3 phase drive system with VVVF Inverter control using IGBT and asynchronous traction motor / PMSM
  10. Braking system: Electric Regenerative brake with continuous  blending of Electro Pneumatic friction brakes and parking brakes.

Continuous automatic train protection with continuous transmission of permanent movement authority (ETCS Level 2 System based on LTE Radio Communication with Train).

ETCS Level -2 (European Train Control System) with LTE. LTE Communication System without loss at speeds up to 350 kmph. Cab Signalling on board system.

Automatic train control system with ATP, ATO (equivalent to GOA level2) with block length of approximately 8 km. Operation Control Centre (OCC) with Backup Control Centre (BCC) with RBC capable of handling 50 trains (approx.). Mobile Radio System, CCTV Telephone, PAS, PIDS, Clock etc.

Central Computer System (CCS), Smart Card (EMV   based), Mobile Apps/ Mobile web Application, Station Computer System (SCS), Ticket Office Machine (TOM), Ticket Vending Machine (TVM)/ Self, Service Ticketing KIOSKS, Mobile Ticket Counter (MTC), Portable Processing unit (PPU), Automatic Gate (AG)

  • Total Estimated Cost Without Taxes (at March 2020 Prices): Rs. 49918.70 Crores (inclusive of land).
  • Total Estimated Cost with all taxes& duties (March 2020 base): Rs.55053.83 Crores (inclusive of cost of land).
  • Estimated completion cost with all taxes, land cost, Escalation & IDC: Rs 63940.67 Crores (inclusive of cost of land).

Rs. 2.75 per km in Standard Class.