(07-28-2019, 11:25 PM)guohua Wrote: Yes, today, setting at train tracks with a long slow train at Grand ave & Bethonyhome rd, in our Truck,
there was a Phoenix, PD setting next to us, it is HOT so yest everyone's window are up and A/C's on...

(07-29-2019, 06:50 PM)guohua Wrote: @"BIAD" 
If your train tracks are so Weak,,, maybe they need to import tracks from Phx, Az...

Quote:You may not realise it, but a summer heatwave can cause as many problems
for the rail network as a downpour

In case a British summer features abnormally high temperatures, we have to plan for
intense heat, which can cause rails to buckle. When Britain enjoys a summer heatwave,
rails in direct sunshine can be as much as 20°C hotter than air temperature.

Because rails are made from steel, they expand as they get hotter, and can start to curve
–known as ‘buckling’.

Most of the network can operate when track temperatures heat up to 46°C –roughly
equivalent to air temperature of around 30°C –but rails have been recorded at temperatures
as high as 51°C.

Keeping trains running in high temperatures
When our remote monitoring systems tell us that a section of track might be expanding too
much and could cause problems, we introduce local speed restrictions.
Slower trains exert lower forces on the track –this reduces the chance of buckling.

Rails sometimes buckle even with prevention in place, and this means we need to close the
line and repair the track before trains can run again. This can disrupt journeys because we
often have to wait until the rail temperature has dropped before we can carry out these
essential repairs.

How we prevent tracks from getting too hot
We work closely with specialist weather forecasters and local weather stations to make
necessary plans and take action so rails are less likely to buckle.

*Our teams check track stability each winter as part of ongoing maintenance,
and strengthen any weak parts before summer.

*We paint certain parts of the rail white so they absorb less heat – and expand
less. Typically, a rail painted white is 5°C to 10°C cooler than one left unpainted.

*As most track is made up of long pieces of rail that are stretched and welded
together, there is much less chance of buckling in very high temperatures because
there is reduced compression.

*When a track is made up from short rails bolted together, we leave small gaps
between each one so that expansion doesn’t cause a problem.

*We’re always improving how we measure and calculate rail temperatures.
One way we’re doing this is by installing probes that alert us when track
temperatures rise to give us chance to take action and stop a problem
before it happens.

In some parts of Britain’s rail network, tracks are laid on reinforced concrete
slabs rather than on sleepers and ballast (the bed of stones that supports the
sleepers). This helps to prevent rails from buckling...'

(07-29-2019, 08:40 PM)gordi Wrote: There's just one thing for it...

(07-29-2019, 08:40 PM)gordi Wrote: There's just one thing for it...