Final answer:
The speed limit will be 45 mph in the speed zone.
Step-by-step explanation:
The speed limit will be 45 mph. The question states that a speed zone is ahead, and drivers should be prepared to reduce their speed to 45 mph. Therefore, the speed limit in the speed zone will be 45 mph.
Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed, expressed as kilometres per hour or miles per hour or both.
Speed limits in India vary by state and vehicle type. In April 2018, the Union Ministry of Road Transport and Highways fixed the maximum speed limit on expressways at 120 km/h, for national highways at 100 km/h, and for urban roads at 70 km/h for M1 category of vehicles.
The speed limit on a single carriageway is 'national speed limit' which is 60mph for a car, and 50mph for a car towing a trailer. You will often find slower-moving road users on single carriage ways so always be aware of cyclists, tractors or equine.