How events unfolded

North

To Croydon

Tunnel

Sandilands

tram stop

1

Site of

crash

2

3

Addiscombe

Road

4

Sandilands Road

1

Data from the black box recorder shows the tram was travelling at 49mph (78km/h) in the tunnel

2

Tram slows only slightly and too late as it approaches curve, which has a 12mph speed limit

3

Travelling at approximately 46mph the tram tips as it enters the curve

4

The two-car tram, weighing about 37 tonnes, comes to rest on its side

The approach to

Sandilands Junction

Distances measured from

the 20km/h speed restriction sign

180 metres

The point at which a tram must start braking to slow from 80 to 20km/h before the bend

Tunnel

(80km/h

limit)

90 metres

Earliest point at which the 20km/h sign becomes readable in the hours of darkness

Tunnel

exit

Direction

of travel

+24 metres

The tram derailed and tips on to its right side

20km/h sign

+49 metres

Tram comes to rest with its cab 49 metres past the 20km/h sign

To

Sandilands

Guardian graphic | Source: Rail Accident Investigation:

Interim Report 2; Google

How events unfolded

To Croydon

North

Tunnel

Sandilands tram stop

1

Site of

crash

2

3

4

Addiscombe

Road

Sandilands Road

1

Data from the black box recorder shows the tram was travelling at 49mph (78km/h) in the tunnel

2

Tram slows only slightly and too late as it approaches curve, which has a 12mph speed limit

3

Travelling at approximately 46mph the tram tips as it enters the curve

4

The two-car tram, weighing about 37 tonnes, comes to rest on its side

The approach to Sandilands Junction

Distances measured from

the 20km/h speed restriction sign

To

Sandilands

Tunnel

(80km/h limit)

Tunnel

exit

Direction

of travel

20km/h sign

180 metres

The point at which a tram must start braking to slow from 80 to 20km/h before the bend

90 metres

Earliest point at which the 20km/h sign becomes readable in the hours of darkness

+24 metres

The tram derailed and tips on to its right side

+49 metres

Tram comes to rest with its cab 49 metres past the 20km/h sign

Guardian graphic | Source: Rail Accident Investigation: Interim Report 2; Google