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New M50 speed cameras

Davy

Noticed white lines on the M50 northbound today just before J3, think it was on all lanes not sure, but im pretty sure they weren't their yesterday. They are painted exactly like the garda fixed camera setup, just cant see where the cameras are going to go? The gantry behind seems a bit far back?

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Cookie_Monster

Victor wrote: »

Traffic on a busy section like the M1-M50 flows best at about 60km/h. The faster individuals go, the less traffic the road can carry and the greater likelihood of accidents.

when was the last time you were on the m50?, even at rush hour it generally flows at 100 these days. (well, the outside lane anyway)

Victor

Traffic on a busy section like the M1-M50 flows best at about 60km/h. The faster individuals go, the less traffic the road can carry and the greater likelihood of accidents.

There is a serious problem on that section with weaving traffic and foolish people crossing hatched areas, rushing to get into the "fast" lane.

While a road may be designed for a particular speed, is that speed suited to the users and their vehicles?

Going from the Red Cow to the airport, going at 120km/h might save you 2-3 minutes.

Cookie_Monster

tonc76 wrote: »

Rather than believe what people say on an anonymous forum why not research a topic properly before forming an opinion??

PS I've got a bag of magic beans that I'll sell to you for €1,000 - interested?:pac:

I can form an opinion on anything I wish without having to go research it. and while what you've said there is plainly ridiculous, I would consider it sensible for our roads to have a much higher design speed than the legal limit allows, purely for safety reasons.

There are several scenarios where vehicles (Emergency services) have to travel well in excess of 120 for example. 160 pkh also roughly equates to 100mph, which is where it probably comes from.

tonc76

Cookie_Monster wrote: »

:eek::eek::eek:

Something on the internet that may be true, shocking. Why not believe stuff posted on boards, it provides a lot of useful information.

Rather than believe what people say on an anonymous forum why not research a topic properly before forming an opinion??

PS I've got a bag of magic beans that I'll sell to you for €1,000 - interested?:pac:

larryone

Cookie_Monster wrote: »

Well regardless, it means its designed to at least 120 then, if not 160. so why is it only 100, as the lanes are a foot or 2 narrower? That doesn't make sense to me.

Because most Irish drivers dont seem to be able to use motorways properly.
The lack of lane discipline people have here makes a higher speed limit alot more dangerous.
Also - lane widths have a huge impact on the maximum safe speed. If they're narrower, lane drift is much more likely at higher speeds.

Cookie_Monster

SeanW wrote: »

Regardless of whether the speed limits are logical or not, I suggest that anyone who has observed a speed camera being set up should report their observations here:
http://www.irishspeedtraps.com/

the fixed cameras are disgracfully biased towards the upper east coast :mad:

SeanW

Regardless of whether the speed limits are logical or not, I suggest that anyone who has observed a speed camera being set up should report their observations here:
http://www.irishspeedtraps.com/

celticbest

Not sure what needs to be done but can this thread be merged with this thread http://www.boards.ie/vbulletin/showthread.php?t=2055928792:confused:

Cookie_Monster

tonc76 wrote: »

Sweet Jesus :rolleyes:

:eek::eek::eek:

Something on the internet that may be true, shocking. Why not believe stuff posted on boards, it provides a lot of useful information.

Cookie_Monster

Well regardless, it means its designed to at least 120 then, if not 160. so why is it only 100, as the lanes are a foot or 2 narrower? That doesn't make sense to me.

Squeaksoutloud

Empire o de Sun wrote: »

The design speed in the DMRB (Design manual for roads and bridges) is used to design for the specified road type & speed. It doesn't mean you can't travel faster. It is a design speed that gives you safe geometry, signhtlines, spec etc. to design a road. These will have a safety factor built into them of course but it still remains at 120 km/h. The safety factor could be 1.5 or 2.0. That I do not know.

The 160 km/h come from the fact that it corresponded to 100 mph and everyone assumed that this was the magical number.

The design speeds are from memory

120 km/h
100 km/h
85 km/h
70 km/h
60 km/h
50 km/h

These figures are correct. Table 3 of NRA TD 9/05 lists the safe design parameters for each design speed. The maximum design speed is 120km/h.

Empire o de Sun

Cookie_Monster wrote: »

its come up here and and the motors forum dozens of times from various sources that Irish motorway are designed to a spec 160kph. I dunno if its entirely true but I've seen it enough on here to believe it.

By its very nature a road with a legal maximum speed of 120 will have to be capable of allowing greater speed, otherwise the majority of traffic will be operating at the limit of the roads design which is inherently dangerous.

The design speed in the DMRB (Design manual for roads and bridges) is used to design for the specified road type & speed. It doesn't mean you can't travel faster. It is a design speed that gives you safe geometry, signhtlines, spec etc. to design a road. These will have a safety factor built into them of course but it still remains at 120 km/h. The safety factor could be 1.5 or 2.0. That I do not know.

The 160 km/h come from the fact that it corresponded to 100 mph and everyone assumed that this was the magical number.

The design speeds are from memory

120 km/h
100 km/h
85 km/h
70 km/h
60 km/h
50 km/h

tonc76

Cookie_Monster wrote: »

I dunno if its entirely true but I've seen it enough on here to believe it.

Sweet Jesus :rolleyes:

Highly Salami

channelsurfer2 wrote: »

where is junction 3?

M1/M50

richardjjd

channelsurfer2 wrote: »

where is junction 3?

M1/airport

Cookie_Monster

Empire o de Sun wrote: »

I've used the Design Manual for Roads and Bridges for many years and have never seen 160 km/h design speed.

the maximum design speed is 120 km/h,

its come up here and and the motors forum dozens of times from various sources that Irish motorway are designed to a spec 160kph. I dunno if its entirely true but I've seen it enough on here to believe it.

By its very nature a road with a legal maximum speed of 120 will have to be capable of allowing greater speed, otherwise the majority of traffic will be operating at the limit of the roads design which is inherently dangerous.

Empire o de Sun

Cookie_Monster wrote: »

why should that matter in the slightest?

Most of that road is designed for 160kph and should be 120, slightly narrower lanes is not a good reason to lower it to 100. the lanes are still wide enough for all vehicles and properly marked.

I've used the Design Manual for Roads and Bridges for many years and have never seen 160 km/h design speed.

the maximum design speed is 120 km/h,

channelsurfer2

where is junction 3?

Cookie_Monster

godtabh wrote: »

They arent artificially lowered. The lane widths have been reduced hence a lower speed limit

why should that matter in the slightest?

Most of that road is designed for 160kph and should be 120, slightly narrower lanes is not a good reason to lower it to 100. the lanes are still wide enough for all vehicles and properly marked.

Mitch Connor

godtabh wrote: »

They arent artificially lowered. The lane widths have been reduced hence a lower speed limit

the design speed of the road is still higher than 100km/ph.

godtabh

Cookie_Monster wrote: »

Especially on motorways that have artificially lowered limits already!

They arent artificially lowered. The lane widths have been reduced hence a lower speed limit

faceman

Speed camera on the M50 is pointless as the M50 has so many regular users. radar cams would be far more effective.

Davy

Looking at this today, the only pace where they could mount the cameras is on the VWS gantry a little south of it. It will be covering all four lanes.

the_syco

Stonewolf wrote: »

Because of all those horrible accidents that happen on motorways ...

Money trees grow better at the side of motorways...:rolleyes:

Cookie_Monster

Stonewolf wrote: »

Because of all those horrible accidents that happen on motorways ...

Especially on motorways that have artificially lowered limits already!

Stonewolf

Because of all those horrible accidents that happen on motorways ...

donspeekinglesh

Yeah, noticed them this morning. Don't think they were there yesterday.
They're in about the same place as the camera used to be before the upgrade work.