To ask the Secretary of State for Transport under what circumstances reduced speed limits can be imposed on dual carriageways. 
Local highways authorities can introduce lower speed limits on dual carriageways in accordance with guidance contained in Circular Roads 1/93, such as to improve road safety or for environmental reasons.
To ask the Secretary of State for Transport if he will review the Road Traffic Regulations 1984 relating to the exemptions of emergency ambulances from speed limits. 
Ambulances on emergency duty are exempt from speed limit regulations as set out in the Road Traffic Regulation Act 1984. My Department recognises the requirement to keep all its regulations under review and this includes regulations to exempt vehicles from speed limits.