Split Second 1998
Lynn Silverman Split Second 1998 Iris Print from black and white medium format negative and computer print out
Split Second: Acceleration
1998
Iris Print from black and white medium format negative and computer print out

The ubiquitous cable, with its male and female connectors, is used in all the procedures to monitor the tracks. The vibrations of a moving train can be seen in the three-dimensional computer print out.
Lynn Silverman Split Second 1998 Iris Print from two black and white medium format negatives
Split Second: Tunnels
1998
Iris Print from two black and white medium format negatives

By projecting an arc of light emanating from the carriage, this test train inspects the envelope through which trains pass. The engineers are looking for branches, shifting masonry, or any other objects that might impede the safe passage of the train.

Lynn Silverman Split Second 1998 Iris Print from black and white medium format negative and computer print out
Split Second: Rock Face
1998
Iris Print from black and white medium format negative and computer print out

The information gleaned from the arc of light is recorded digitally. Print outs may be obtained from the data. I selected a particular profile of a rock face to photograph from the train's window. Although the train was moving very slowly, my high speed film could only capture a blurred image of the rock face's profile recorded in the drawing.
Lynn Silverman Split Second 1998 Iris Print from two black and white medium format negatives
Split Second: Platform Measuring Gauge
1998
Iris Print from two black and white medium format negatives

This old fashion instrument measures the space between the track and platform, ensuring that a safe distance is maintained between the two.

Lynn Silverman Split Second 1998 Iris Print from black and white medium format negative and captured video image
Split Second: 70 Miles Per Hour
1998
Iris Print from black and white medium format negative and captured video image

A number of video cameras are strategically placed around the undercarriage of this test train designed to monitor the track. The photograph on the left was made from the back of the train at the same time a video camera recorded the view of the tracks from the front of the train while moving 70 miles per hour.
Lynn Silverman Split Second 1998 Iris Print fom two black and white medium format negatives
Split Second: Gauge Corner Cracks
1998
Iris Print fom two black and white medium format negatives

The weight of the train and friction caused by constant contact between the wheels and track, over time, may affect the integrity of the metal. Engineers are always on the lookout for cracks and fissures on the top of the rail. Cracks have been identified on this length of track.

Lynn Silverman Split Second 1998 Iris Print from black and white medium format negative and copy of a Polaroid image
Split Second: Broken Rail
1998
Iris Print from black and white medium format negative and copy of a Polaroid image

This is a very dangerous piece of rail that has been removed for examination. Using an electron microscope and Polaroid material, the metallurgy department is able to analyze flaws and defects in the rail track.
Lynn Silverman Split Second 1998 Iris Print from two black and white medium format negatives
Split Second: Bogie Rotation
1998
Iris Print from two black and white medium format negatives

In addition to vibrations, lateral movement of the carriage may also cause a full cup of coffee to spill its contents. An instrument in the workshop monitors the lateral movement of the bogie, the undercarriage of a car.

Lynn Silverman Split Second 1998 Iris Print from two black and white medium format negatives
Split Second: Spraying and Grinding
1998
Iris Print from two black and white medium format negatives

These images were photographed from two moving trains. One train sprays for weeds during the day, the other grinds rails at night.
Lynn Silverman Split Second 1998 Iris Print from black and white medium format negative
Split Second: The Apron
1998
Iris Print from black and white medium format negative

Several test trains are parked on the forecourt of Serco's offices. An Intercity train can be seen speeding by on an adjacent track.

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