Setting HGV Speed Limits

BigBripocket · Posted: Sat Jul 04, 2009 9:13 pm Post subject: Setting HGV Speed Limits

Hi
I drive a truck and have been trying to find a way to get warnings of SpeedCams on single carriageway roads where the National Speed limit applies (40mph for trucks!). I realise that it is not a viable option to have multiple files for vehicles with different restrictions, so rather than taking chances, I would like to be warned for ALL cameras. I don't know if I'm being thick, but so far I haven't found a way of doing this.
Can anyone please suggest a solution? I'm not completly dumb, being able to create POIs etc, but I must be missing something!
Thanks

Garmin SP510c
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BigBri

Darren · Posted: Sat Jul 04, 2009 10:26 pm Post subject:

What device do you have? We have the Single File and Consolidated by Type files which do not have speeds associated with them.

But Garmin units operate differently.
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Darren Griffin

mikealder · Posted: Sun Jul 05, 2009 7:43 am Post subject:

I don't think our database will give you anything other than a warning of a camera position, it can be set up for speed related warnings but the speed data is for cars.
The national speed limit differential between a car and HGV is not covered and would need a specific HGV download of the data to be created (not easy).
Personally I would like to see the NSL scrapped and replaced with 50MPH for all vehicles, when you look at the accidents around Lincolnshire you soon start to see what happens with NSL and no motorways, idiots overtaking trucks playing "chicken" with the approaching traffic - Mike

PaulB2005 · Posted: Sun Jul 05, 2009 9:06 am Post subject:

If you used Ash10s Camera Manager it will alert you to ALL cameras once (regardless of speed) as a Proximity Alert but the Overspeed Alerts would be set to car speeds still.

Daggers · Posted: Sun Jul 05, 2009 9:22 am Post subject:

Are the cameras (or the system behind them) clever enough to realise what type of vehicle is speeding past them? I assumed that they just had a simple setting to flash at a given speed, say 60mph on a single carriageway road. This would mean that a truck exceeding the 40mph limit is not likely to get caught by a 60mph camera.

Perhaps mobiles are more flexible, because there's a person actually monitoring these, but the fixed cameras shouldn't be an issue.
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Garmin DriveSmart 50 LMT-D

Darren · Posted: Sun Jul 05, 2009 9:24 am Post subject:

GATSO's have long since had the ability to trigger at two different speeds, for HGV's and other road users.

I suspect it may well be true of other devices. If you look at the image below you can just about discern the HGV icon above 087 at the top which matches the Car icon at the bottom.

That shows the settings for the different speed thresholds.

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Darren Griffin

PaulB2005 · Posted: Sun Jul 05, 2009 9:26 am Post subject:

I'm sure Andy posted a photo of the control panel inside a GATSO the last time this came up...

ETA: It's here

Darren · Posted: Sun Jul 05, 2009 9:34 am Post subject:

Andy's pics are better than mine Embarassed

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Darren Griffin

mikealder · Posted: Sun Jul 05, 2009 9:35 am Post subject:

There are a few with height finder kit added to the camera, if a tall vehicle goes through it uses the lower limit - not always fool proof though as coaches can set them off at the lower speed even though they should be using the higher speed rating - Mike

eyeQue · Lifetime Member Joined: Aug 27, 2008 Posts: 235

The database does not specify whether:-
50mph[or any other speed] is on a NSL road or
50mph[or any other speed] is on a dual carriageway or
50mph[or any other speed] is on a motorway
so where you are restricted to 40mph on a NSL road you have higher limit on dual carriageways and again on motorways. So it is is impossible task to get what you want.

However, with the Garmin zonned database you have a visual warning of every camera [its type and speed] and you can remove the overspeed warnings.
In your mind you will have to subsitute 40mph for the 60mph on NSL roads, and the same on motorways. I have the same problem with towing on NSL roads and Motorways!

I recommend the visual zoned database for Garmins as shown below.

..

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Garmin Oregon 300 + Garmin iQue 3600
My Zoned Speed Camera Icons, available here.

BigBripocket · Posted: Sun Jul 05, 2009 10:43 am Post subject:

Hi Guys, thanks for all the replies and suggestions, I'll have a look at Ash10's camera manager. At the moment I thought I'd try changing the alert on all the files to proximity rather than speed, I'll let you know...
On the subject of cameras being able to differentiate between vehicle types, I have fallen foul of one of these several years ago on the A52 west of the A1. I think it was triggered by the height sensor to which Mike refers. Then there are mobiles and the dreaded SPECS.
Don't get me started on the NSL and trucks, 40mph is B----y dangerous on some roads (what is it about the Lincs drivers? On a recent cross-county trip I could have been witness to at least 3 potentially fatals had I not braked to allow the cretins pass quickly!). Most of the continent now has 80kph single carriageways for trucks.
Thanks again
Brian
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BigBri

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