| ROADS SUBJECT TO A 50 M.P.H. SPEED LIMIT WHICH HAVE BEEN OR WILL BE CONVERTED TO DUAL CARRIAGEWAYS OR WILL BE BYPASSED | |||||||||
| Roads subject to 50 m.p.h speed limit | New construction (2) | Under construction (2) | Infirm Programme (2) | Preparation Pool (for early 1970's) (2) | |||||
| Dual carriageway | Bypass | Dual carriageway | Bypass | Dual carriageway | Bypass | Dual carriageway | Bypass | Total mileage Cols. (2)-(5) | |
| 386 miles | 8.75 miles | 3.5 miles | 5.75 miles | 4.25 miles | 29 miles | 47.75 miles | 16 miles | 4.25 miles | 119.25 miles |
| Note: By-passing includes those restricted roads which have now been or will be superseded by motorways. |