Network Rail Launches Fourth Ultrasonic Rail Testing Train

NetworkRail launched a fourth ultrasonic rail testing train into service, complete
with ground penetrating radar, ultrasonics and rail profile laser scanner, to
detect minute flaws in the track.

With the original three units being used at their full capacity to keep the track
compliant, the addition of a fourth means one can be taken out of use for
servicing, making the service more resilient and flexible.

Safety remains our number one priority

Director of engineering Steve Yianni said: "Network Rail’s number one priority is
safety and the addition of this unit to our fleet means we can measure the
safety and quality of our railway to much higher standards.

"It also means we can keep our test trains running more reliably and at more
times across the country. With this we can improve the quality of the ride for all
our passengers, and make sure they reach their destination in complete safety."

The new train, or UTU 1 as it is known, has more accurate positioning systems
and an improved ability to test the track. It can also be used at a higher speed,
an important part of our plans for maintaining the network.

Most testing currently takes place at night at speeds of up to 30 mph. With
further development and UTU-1, it is hoped to be able to test the track at
45mph.

The £700,000 UTU1’s systems can analyse many different aspects of the
railway:

Its two separate ground penetrating radar units can detect irregularities in the
ballast and formation up to two metres deep, including voids

The ultrasonic test equipment on board can give early warning of any problems
that could later occur with the track

The UTU’s rail profile scanner uses laser technology to compare the state of the
railhead with a pre-programmed template to judge if the track is becoming
worn out of shape, and in need of grinding

UTU trains do not replace traditional track walks by maintenance staff, although
they do reduce the need for them. Instead, they direct the focus of track walks
to areas needing inspection, saving time and money, and increasing the safety
of the railway.