They say that they have yet to check this on the ground before final sign off.
Just to see what they have done, I spent 30 minutes on Sunday pacing out the physical calming measures, 20 mph repeater roundels and 20 mph carriageway roundels to see if I think they meet the necessary regulations to enable Devon & Cornwall to enforce the 20 mph speed limit.
To be compliant there must be at least one physical traffic calming measure - speed hump, speed table, chicane, bend over more than 70 degrees , etc as outlined under Direction 16 of TSRGB 2002 [see previous blogs!] AND no point of the zone can be more than 50m from
(1) a physical traffic calming measure set under that same Direction 16; or
(2) 20 mph repeater roundel; or
(3) 20mph carriageway roundel
Here's what I found:
Broadway
Gateway to speed table just before LP 2 = 68
To speed table just before PL 4 = 100
To speed table just before LP = 153
This more than exceeds the maximum of 100m between any 2 measures under direction 16
To LH bend = 76.
Bend to flats = 77
Possibly 20mph repeater outside 108 not needed here, and could be placed elsewhere as it is within 50m of other measures
To repeater outside 124 = 89
To Cowick Hill = 33
Greenway
To LH bend = 54
To right angled flats = 102
As the bend is probably NOT 70 degrees in 32m inner radius, I would question the valisity here
Littleway
All valid
Vuefield Hill
To LH bend = 69
To garage outside 23 = 75
Both these stretches are probably non-compliant
Cowick Hill
From Stanway cul-de-sac to roundel outside 127 = 92
Cause for concern
To Broadway Hill = 50
To roundel outside 107 = 60
If a junction is not classied as a bend of not less than 70 degrees, this stretch would not be valid
To table = 44
To roundel on LP 6 = 124
This more than exceeds the maximum of 100m between any 2 measures under direction 16
To table = 72 outside 49
to LH bend = 32
To table = 41
To parkway = 18
To table = ??
Parkway
To hump = 48
To roundel outside 29 = 77
To hump outside 50 = 99
To roundel outside 68 = 85
To end of CDS = 66 but close to 90 degree bend on BW
Orchard Hill
From Cowick Hill to roundel = 44
from Parkway to roundel = 51
From my paced measurements I see at least 5 stretches that probably do not meet direction 16.
I wonder if DCC's Highways officers is agree?
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