Hi all, I work in one of the highways agencies motorway control rooms, and I can explain why there sometimes is nothing there as I am one of those persons that now-a-days sets these signs & signals.
When we get a call from anyone, often via the police because someones phoned in on 999, we MUST set some sort of warning signs.
If the call has come from a member of the public (MOP) and we cannot confirm that the problem, obstruction, accident acutally exists at the location given, we set 50 mph on the signs.
Unfortunately, most people have no idea whereabouts they are on the motorway, they know which junction they’ve got on at, and they know which junction they will be getting off at, but anywhere inbetween will usually be a stab in the dark.
If on the other hand, the call comes from a “reliable source” ie. Police or HATO officer, a recovery agent, Highways Agency contractor, or seen on CCTV, then that is classed as confirmed, and we set whatever is required, eg. lane closures or more severe speeds.
If a MOP calls in from an emergency roadside telephone (ERT) and they can actually see the incident from where they are at the phone, we can set speeds down to 30 mph just prior to the scene.(not lane closures)
**NOTE; if you call in from an ERT we know exactly where that phone is, so will know exactly where any problem is. (ERT phones are free, and come directly into the Highways Agency Control Rooms, and are answered within 20 secs)
Once a patrol (police or HATO) gets to the scene the incident is quickly assessed, then all sorts of things can happen, including the update of the signals, either more severe, or cleared.
ALL signals are only cleared on the say-so of either Police/HATO patrol at scene, no-one else can give that authority, so any reports must be checked before signals can be cleared.
As you can see, it’s much more exact if a MOP calls in from an ERT, rather than calling 999 on your mobile. you will also speak to someone in a motorway control room, who knows about the motorways and the locations, whereas with 999, often you’ll speak to a police call taker who probably knows nothing about motorways, and doesn’t know just what questions to ask you. (no disrespect to them)
People sometimes stop in the live lanes for the most crazyiest of reasons! This is then called in by good citizens, the next thing, the muppet who stopped, realises the wisdom of his ways, and drives off, unless we see them drive off, we are waiting for a patrol to check the area, meanwhile we have signals set as we don’t know that it’s cleared the scene.
You just wouldn’t believe the things that are “dropped” on the c/way requiring intial signals set at 50’s until confirmed with the patrol etc.
how about:…
a complete single bed, a settee, garden shed, garden fish pond (the plastic bit that you sink into a hole) Ladders (regularly, even Trumpton has lost a set in our area once!)) bags of cement, paveing stones, full HGV wheels (HGV tyre bits are many times a day), car spare wheels, push bikes still attached to the roof-rack, top-boxes, suit cases, flat-pack furniture, in fact anything and everything, so if you see 50’s (debris) be aware, slow down, drop back and leave a good bit of room between the car in front and yourself, watch in case he swerves for anything, but most of all, be prepared for anything.
… …
Roadworks are a little different, the signals are set when the foreman of the roadworks “gang” asks for them, they then start to put out the large “hard signage” (ie, the yellow signs showing which lanes are closed) once he has those in place, and has coned off the lanes that they are closing to work in, he calls for the matrix signals to be cleared.
When they are ready to remove the roadworks, he calls for the matrix to be reset.
Then when all the lane closure cones, and the hard signage have been removed, he calls for the matrix to be cleared once more.
… …
We are measured for how quick the signals are set once we are told of something, and we are also measured how quick they are cleared once instructed by a HATO or police patrol.
The signalling system is a computer system, now and again the odd signal won’t go off and the engineer has to go out to fix it, but that is a very seldom. you will only see just one signal on it’s own when this happens.
The police are now actively booking people who go through lane closures, so beware! don’t do it.
(Note: this has been “copy-pasted” from a post that I made on another website)
I can also tell you that anything that says “queue slow” or “queue Caution” in fact any sign that says “queue” on it, has been set automatically.
As you drive down the c/way, you’ll see “squares” in each lane, there’ll be a pair of them close together, they look like the sunken wires just in front of traffic lights. These are similar, they acutally monitor the average speed of traffic in the lanes, and the number of vehicles passing over them, if the speed drops below a certain figure, they activate the VMS (Variable Message Sign) to show “queue” in one way or another. The system automatically checks each site every 3 - 4 minutes, and if the average speed has picked up and shows that vehicles are driving over them, then it switches the signs off. They can be fooled when a slow HGV goes over, ie an Ab load or crane etc.
The “10 miles in 9 minutes” signs, are also automatic, there are camera’s, similar to the ANRP camera’s that “read” a batch of numberplates, the next set of camera look for these numberplates, and work out the time taken (they won’t post a time that makes it faster than 70 mph)
Planned roadworks can be checked on the Highways Agency website (mostly!) and usually have to be a minimum of 5k between them, unless they are “emergency roadworks” (often due to an incident that day, where work needs to be done ASAP) these can be a minimum of 2.5k apart.
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The accident on the M6 J20/19 the other morning was a serious one, with a young boy getting badly hurt, so the police accident investigation unit had to do their stuff on that.
The accident J33/32 the day after, required a person to be cut free from the vehicle and air-lifted to hospital, again accident investigation was required.
Also the on on the M65 on monday, was “likely to prove” (v serious!) accident investigation again.
I’ve never seen accident investigation take less than 3 hours, so if you hear of a serious accident, you can work it out how long it will take as a minimum! Anything that affects the flow of traffic on the c/way expected to last for more than 15 mins, ie lane closures etc. is reported to the NTCC. who then send out the information to all the local radio stations and media outlets. So listen to the Traffic Anouncements.
Note also, the Police are in charge of ALL injury accidents, HATO will do the traffic management to assist, allowing the police to concentrate on the actual incident.
The Highways Agency work closely with the other Emergency services at the scene of accidents, each service being responsible for a particular “part” of the incident.
when there is a motorway closure, most of the local councils DON’T want the motorway traffic flowing along their ordinary roads, the Highways Agency is presently working with councils etc to agree on diversion routes should traffic need to be sent off the motorway, you’ll see the little yellow “squares” “triangles” “circles” etc on roadsigns, that what these will be used for, we’re nearly ready to use them.
One other thing, IF THE SIGNALS ARE INCORRECT, Call the HA information number and complain, I do!!
I was going down to Dover the other week going on holiday, when the signals at a roadworks were so wrong, I phoned in and told them!
All complaints have to be investigated and answered by a manager, they are also recorded & monitored to see if there is a common problem etc.