Each of those lines has had one "newfangled" test train running on it since 1992.

When the test train went through the signal at 25 miles per hour, it stopped before the point of impact.

At the end of January, equipment on the test train proved wanting yet again.

The test train was expected to perform trial runs from mid 2009, but did not begin network testing until April 2010.

The first test trains were run a few years after the start of construction.

But the $45 million needed to design and build the two test trains will come from the authority's current capital program.

Then they ran a test train along the new track and checked the signal switch.

They had been used as a test train for several years.

The first test train ran on May 19, 2007.

A test train will first be delivered in 2013.