Network of the speed cameras

  • 356 Views
  • Last Post 22 December 2017
Ramin posted this 05 December 2017

Hi, 

I need to construct a connected road network from all available speed cameras; e.g. I need to know if there is a road link connecting camera 1 location to camera 2. This is practically impossible to go through all the 6000 cameras to find out how cameras are located with respect to one another, and I am pretty sure there should be some kind of summary sheet of such network in terms of road links with tail/head coordinates, which I am unable to find. I would be so thankful if anyone could advise.

Order By: Standard | Newest | Votes
Paul Watkins posted this 12 December 2017

Hi Ramin,

WebTRIS doesn't contain speed camera data or their location. You could raise a query with the general Highways England helpdesk () and they will point you to the appropriate team.

Thanks, Paul

James_ posted this 15 December 2017

As an update to webTRIS could there be an inclusion of ANPR data, similiar in function to the old JTDB? That way users could access average speed data, which would be more appropriate than trying to build something from point-based loops?

Paul Watkins posted this 21 December 2017

Unless Ramin corrects me I was taking 'speed cameras' to be the gantry speed limit cameras, rather than any form of speed recording cameras.

We can certainly provide Ramin with the network data in the form of shape files, or flat form files with co-ordinates (or both!).

Ramin posted this 21 December 2017

Hi Paul,

Thank you for your reply and my apologies for the confusion.

By speed cameras I meant road sensors which are used to monitor the speed and flow of roads.

I know I can find the coordinates of the site of each sensor individually or in a group, but the problem is that unless I check all of them rigorously in relation to one another, I can not attain a network-wide view on the linked pairs; i.e to see if a pair of given sites are on the same road link.

What I need is some kind of spreadsheet file containing links with the coordinates of the tail and head of the links which are actually the sensor sites, and preferably the direction of the flow on each link.

    

Paul Watkins posted this 21 December 2017

Hi Ramin,

No problem!

In the API there is section for downloading all available site metadata data. It will look something like the below;

Id": "2",
      "Name": "MIDAS site at A1M/2259B priority 1 on link 126046101; GPS Ref: 514029;294356; Southbound",
      "Description": "A1M/2259B",
      "Longitude": -0.320275451712423,
      "Latitude": 52.5351577963853,
      "Status": "Active"

If you were to download all of them you could see which links have multiple sites per link. It gives 2 forms of co-ords and the directionality/road number. I can provide the shape file separately if you wish and you could map the results in a GIS application.

Would that provide what you need? We could provide extra data in flat files, such as the links and their nodes (with lat/lon). If you do need the extra data get in touch with us at PerformanceAnalysisUnit@highwaysengland.co.uk and we'll go from there.

Thanks, Paul

Ramin posted this 21 December 2017

Hi Paul,

Great! Thanks for the info. That seems to be what I look for.

To get the shape files, and links and their nodes with lat/lon, should I send you an email at Paul.Watkins@highwaysengland.co.uk or the other email you mentioned above (PerformanceAnalysisUnit@highwaysengland.co.uk )?

 

Thanks,

Ramin

Paul Watkins posted this 22 December 2017

Hi Ramin,

The second one would be good. It's Xmas time so the service we have over the next week and a half will be extremely limited.

Thanks, Paul

Categories
Search
Popular Tags
Hot Topics
Close