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dchv Occasional Visitor
Joined: Jun 29, 2005 Posts: 4
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Posted: Mon Nov 07, 2005 10:32 pm Post subject: Sppeds to calculate journey times |
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Can anyone tell me what speeds TTG uses for various types of road to calculate the journey times? |
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Oldboy Pocket GPS Moderator
Joined: Dec 08, 2004 Posts: 10643 Location: Suffolk, UK
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Posted: Tue Nov 08, 2005 7:59 am Post subject: |
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About 67 mph for Motorways and fast dual carriageways, and about 56 mph for other A roads. Presumably slower roads at a lesser speed. Note that not all the road speeds are correctly set, what with large areas now restricted to 30 and 40 mph. _________________ Richard
TT 910 V7.903: Europe Map v1045
TT Via 135 App 12.075: Europe Map v1120 |
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rkm_hm Frequent Visitor
Joined: Nov 28, 2004 Posts: 532 Location: Warwick, UK
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Posted: Tue Nov 08, 2005 4:01 pm Post subject: |
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Oldboy wrote: | About 67 mph for Motorways and fast dual carriageways, and about 56 mph for other A roads. |
Those are presumably average speeds - 'cos when you do a simulation, it shows higher - often illegal! - current speeds? _________________ Roger
TomTom via135
Satmap Active 10+ v1.50 with full UK 1:50k map and 1:25k/1:10k County maps of Hampshire & Warwickshire |
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Oldboy Pocket GPS Moderator
Joined: Dec 08, 2004 Posts: 10643 Location: Suffolk, UK
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Posted: Tue Nov 08, 2005 5:59 pm Post subject: |
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rkm_hm wrote: | Oldboy wrote: | About 67 mph for Motorways and fast dual carriageways, and about 56 mph for other A roads. |
Those are presumably average speeds - 'cos when you do a simulation, it shows higher - often illegal! - current speeds? |
When I drove at 67 on a Motorway for about 2 hours the ETA remained constant (it wasn't Friday pm, and I wasn't in a hurry).
It has been suggested that the Demo Mode of 75 mph is something to do with the program running at kph speeds. I don't know. _________________ Richard
TT 910 V7.903: Europe Map v1045
TT Via 135 App 12.075: Europe Map v1120 |
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Unplugged Regular Visitor
Joined: Jul 31, 2005 Posts: 142 Location: Northampton
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Posted: Tue Nov 08, 2005 6:10 pm Post subject: |
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I could be wrong but I dont think 40mph roads are listed as most of them around here the ETA is over exagerated when driving at 40 |
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