ความคิดเห็นที่ 1
A329(M) กับไม่มี M มันต่างกัน
It means that this route has both 'A' (major route class) and 'M' (motorway class). Meaning that not entire route is dual-carriageway (2 lanes on either side)
'A' class may have one and two lanes along the route.
http://www.cbrd.co.uk/roadsfaq/#21
Motorway:
A set of standards are common to the vast majority of the motorway network and these can be used to more practically identify one:
- The road is signed as a "motorway" and has blue signs.
- The road's number is prefixed with "M" or suffixed with "(M)".
- The road is entirely dual-carriageway.
- The road's junctions are entirely grade-separated (with the possible exception of its terminii).
- The road has hard shoulders for most of its length and is fitted with emergency telephones along the hard shoulder every 1.5km in each direction.
- The road has a speed limit of 70mph.
2. Classification and Numbering
2.1 How are the roads classified?
Classification refers to the allocation of numbers to British roads. There are three tiers of classification: motorways, A-roads and B-roads. Motorways are grade-separated expressways and have 1, 2 or 3-digit numbers prefixed with 'M' or suffixed '(M)'. A-roads are the other major routes; they vary from motorway-standard to narrow local roads, and have 1, 2, 3 or 4-digit numbers prefixed with 'A'. B-roads are local routes and have 3 or 4-digit numbers prefixed with 'B'
จากคุณ :
genf  
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26 มี.ค. 51 05:21:18
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