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Height and Weight Restrictions


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The standard height clearance over the highway is 16'6" (5.03m). Bridges with clearance below this have signs attached warning road users of the safe clearance.

There is no statutory limit governing the overall height of a load on the highway but wherever possible it should not exceed 16'3" (4.95m) in order to make maximum use of the road network.

The current list of Height Restrictions is shown below:

Structure NameLocationN.G.R. (O.S.   Sheet SH)RouteUnderHeadroom
Station Road Llanfairfechan 26800 37530 Unclassified Railway / A55 3.12m / 10’ 3”
Shore Road East Llanfairfechan 26840 37550 Unclassified Railway 1.83m / 6’ 0”
Bangor Road Railway Conwy 27665 38725 A547 Railway 4.19m / 13’ 9”
Llandudno Junction Flyover Llandudno   Junction 27905 37790 Unclassified A527 4.34m / 14’ 3”
Llandudno Junction LCR Bridge Llandudno   Junction 28060 37750 Unclassified A470 3.10m / 10’ 3”
Black Cat Glan Conwy 28080 37705 B5381 Private Road 4.04m / 13’ 3”
Glan y Wern Road Mochdre 28270 37925 Unclassified Railway / A55 3.43m / 11’ 3”
Dinerth Road Mochdre 28310 37940 Unclassified Railway / A55 13’ 3” / 4.103m
Marine Road Railway Bridge Colwyn Bay 28470 37940 Unclassified Railway 3.73m / 12’ 3”
Beach House Road Llanddulas 29170 37830 Unclassified Railway 3.28m / 10’ 9”



Conwy Town Wall Arches:

ArchWidthHeight (to Springing)
A547 Bangor Road Arch 2.90m (9’ 6”) 3.66m (12’ 0”)
A547 Berry Street Arch 2.90m (9’ 6”) 4.50m (14’ 9”)
B5106 Gyffin Road Arch 3.05m (10’ 0”) 3.89m (12’ 9”)
Upper Gate Street Arch 2.75m (9’ 0”) 3.70m (12’ 2”)
Lower Gate Street 2.90m (9’ 6”) 2.20m (7’ 3”)



Weight Restrictions on Bridges

Bridges failing to meet the 40/44 tonnes standard normally have a weight restriction imposed until they are strengthened or replaced. Alternatively a regime of regular monitoring may be put in place. The weight restriction depends on the assessed capacity of the bridge. The current list of Weight Restrictions is shown below:

Structure NameLocationN.G.R. (O.S. Sheet SH)RouteOverWeight Limit
Dolau Culvert Bylchau 9485 6116 U/C River 3 tonne
Pont Stesion Llanfairfechan 6800 7519 Private River 3 tonne
Plas Panton Culvert Bylchau 9699 6245 Unclassified River 3 tonne
Pont Dawn Dawn 8640 7265 Unclassified River 3 tonne
Faenol Avenue Bridge Abergele 9491 7777 Unclassified River 3 tonne
Plas y Trofarth Culvert Llangernyw 8592 6914 Unclassified River 3 tonne
Pont Cae’r Felin Llanrwst 8005 6196 Unclassified River 3 tonne
Gors Farm Bridge Towyn 9777 7865 Class 3 River 7.5 tonne
Melin Gadeg Llansannan 937 641 Unclassified River 7.5 tonne
Pont Fawr Llanrwst 798 614 B5106 River 18 tonne
Pont Trefriw Trefriw 7808 6309 B5106 River 18 tonne
Tanaeldroch Dolwyddelan 770 539 Unclassified River 18 tonne
Pont Glyn Diffwys Maerdy 9920 4440 Class 3  River 18 tonne
Pensarn Station Abergele 946 787 Unclassified Railway 20 tonne

 

 

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Abnormal Loads and Restrictions Abnormal Loads Height Restrictions
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Conwy County Borough Council
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LL30 9GN
Telephone: 01492 574000
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