Hi Guys,
I know its been done before but I’ll try to explain some of the issues with matrix signs for those who may not know. Rest assured the HA guys do their best to get these right, but the systems are not perfect and problems do exist. The whole matrix system rules are quite tight but the good news is that some work is being done to try and improve this as its accepted that they are not used in quite the right way sometimes.
MIDAS LOOPS - the system sets the matrix automatically when the sensors detect slow moving traffic; they switch on signs beforehand to slow the traffic down, so in theory the traffic slows beforehand and evens out the traffic flow. Its a very hit and miss system.
Personally, in my area this doesn’t work too well as the last MIDAS loops are just before a trunk road and the queues are always much longer than the signs are located., so after 15 minutes of sitting in heavy traffic you see a sign saying “Queue Slow Down”. I can see why that’s a bit of a ####take!
INCIDENT SIGNS - half the time these cause more hassle than they are worth. The control rooms (RCC) have very strict rules on what can and cannot be displayed, so a lot of the time “INCIDENT SLOW DOWN” is shown as a generic message until a more confirmed message can be shown with lane closures etc.
RCC will also light up a whole section of motorway for messages as the initial calls about an incident may only state “between J10-11”, which is fine if those junctions are 1 mile apart but when they are 10 miles apart what do you do? Show nothing at all or light the whole junction up?
Also, certain messages must be displayed on both carriageways even if the incident is only reported on one side, eg Pedestrians, Animals, Oncoming Vehicle etc. In some areas message signs don’t exist, except the small MS1 signs in the central res, so any incident will get 50s as speeds are pretty much all that can be shown.
The reason you may see signs that are wrong or seem to be reporting a non-incident are varied; sometimes the job just isnt there when we get to it (particularly with debris), the situation may have just changed (it takes a little time to change or clear a sign, its less than a minute but within that minute traffic will have passed under what they percieve to be an incorrect sign) or the signs are not on as the job hasn’t some through to the RCC yet. There are sometimes delays between communication with the RCCs and Police etc. However, sometimes someone may have made an error and not cleared the signs, no ones perfect though, we all make mistakes?
SAFETY MESSAGES, WARNINGS ABOUT INCIDENTS A LONG WAY AWAY - These are set by the National Control Room (NTCC), who look at the national picture 24/7. They will set signs in other regions for big incidents far away from you, the theory being that those travelling long distance can alter travel plans early.
There can be problems with these signs and HATOs are encouraged to report incorrect signs to get them cleared. MIDAS signs can sometimes be be cleared by the RCC but I would need an RCC operator to confirm that.
HATOS NOT STOPPING WITH BDVs - The days of us sitting with every BDV have long gone. We will stay with certain vehicles as a matter of course (eg fuel tankers) and sometimes BDVs if there are problems. As a rule though, we will not sit with every BDV.
We will stop with BDVs whilst on routine patrol that we find, check they have recovery and are ok (after all, they could have stopped as they are unwell) then leave them. if they have no recovery, we can assist them or leave them to it if do not want our help. We are also told by AA/RAC etc of breakdowns they are dealing with and are told “recovery arranged with 30 mins, persons ok, no need to attend”. Is there any point in travelling 30 miles to check on a BDV that AA are on route to, and who say they are ok? In the examples given above, those cars may already have been checked on and are all ok?
HATOS AND “REAL” EMERGENCY SERVICES - The HATOS are officially a Category 2 responder. We attend incidents that used to be attended by blue lighters, at a slower pace, but as quickly as we can. We do our best but we are so regulated its untrue. I certainly do not “trundle along” - in fact I take offense at that as I do my best to attend as quickly as possible, but without breaking the law. I’ve been stung by management for trying to get somewhere quicker before and I can’t afford to lose my job.
Furthermore, I have arrived first on scene at many jobs, but other occassions I am last to get there. Its the nature of the beast that sometimes you will be far away from the job, and other times it happens right in front of you.
Hopefully that’s explained a bit, sorry for the long post. I’m not trying to teach granny to ■■■■ eggs but the HA don’t seem to shout about what we do and why we do it. Any more questions I’ll try to answer fairly. What we have isn’t perfect but we are trying to improve it.