SOD, Accident

 For Existing Works-

 Horizontal Distance of any fixed structure (upto 305 mm height), from centre of track - 1675 mm

From 305 mm to 4520 mm - 2135 mm.

Max height of any  signalling gear between track lines - 64 mm.

SOD of the Signal -

SOD of a signal is measured from outermost part of the Signal.Outermost point is generally ladder.

For new work- 

Rail level to 305 mm above rail level -1905 mm.

From 305 mm to 1065 mm - 2360 mm.( Distance of Signal Post from centre line of track)

From 1065 mm to 3735 mm - 2360 mm.

Existing yard-

gradient is steeper than 1 in 400 and upto and upto 1 in 100 -  CRS Permission is required 

If gradient is steeper than 1 in 100 - Railway Board through CRS.

New yards or New Work - 

In Station Section, Maximum Gradient recommended is 1 in 1200.

For Single line, Station yard will be extended to a distance of 50 m beyond outermost points at either end of the station.( For purchase of maximum gradient Permitted).

In block section, Steeper than 1 in 400 and upto 1 in 260 -CRS

If steeper than 1 in 260 - Approval of Rly board required 

For the purpose of Maximum gradient permitted in Station yard as per SOD, on a single line,a Station yard will be taken to extend to a distance of 50 m beyond outermost points at either end of the station.

Five types of accident

1. Train Accident 

2. Yard Accidents

3. Indicative Accidents 

4. Equipment failure 

5. Unusual Incident. 

A B C D E - Train Accident + Yard Accident

F, G,H - Indicative Accidents 

J,K,L,M - Failure of Equipment.

N,P,Q,R - Unusual Incident. 

Class A - All types of collisions

Class B - Fire and blasts

Class C - LC gate Accidents

Class D - All types of Derailment

Class E - Collision on obstruction on passing over obstruction or passing over obstruction but safe.

Class F - Averted Collision Cases( Indicative Accidents)

Class G - Breach of Block Rule ( Indicative Accidents)

Class H - Train pass at danger( Indicative Accidents)

Class J  - Failure of Engine

Class K - Pway Failure 

Class L - Electrical failure

Class M - All S&T failures.

Class N-  Train wrecking

Class P - Passenger Casuality

Class Q - Other Incident 

Class R - Miscellaneous 

ART has 30 sets of 5W VHFs

SPAD is the example of indicative Accidents.

ART-

As per accident manual, target time for starting ART  is 30 min in Day.

In the night it is 45 min.

Max speed of ART is 100 Kmph.

ARMV( Accident Relief Medical Van)

Target time for starting of ARMV from Single exist siding is 25   min in both day and night.

Target time for turning out  ARMV from Double exist siding is 15 min in both day and night.

Max speed of ARMV will be sectional speed.

First Priority for moving will be given to ARMV then ART.

Hooter

After Accident hooter will blow for 45 seconds.

Difference between two hooter is 5 seconds.

To cancel previous message Hooter of 90 seconds will blow.

Hooter code is repeated after 5 min.

For cancellation of ART/ ARME - One long siren of 90 Second.

Time after 24 hrs of Accident is called Golden Hour.

Serious Accident 

1) If loss is more than 2 crores.

2) if there is human life loss

3) Very serious injury 

Recommended gradient in Station yard - 1 in 1200.