Road speed limits are used in most countries to regulate the speed of road vehicles. Speed limits may define maximum (which may be variable), minimum or no speed limit and are normally indicated using a traffic sign. Speed limits are commonly set by the legislative bodies of nations or provincial governments and enforced by national or regional police and / or judicial bodies.

The first maximum speed limit was the 10 mph (16 km/h) limit introduced in the United Kingdom in 1861. From 2005 to 2010, the highest posted speed limit was 160 km/h (99 mph) in Abu Dhabi, although this was reduced to 140 km/h (87 mph) in 2011. However, some roads have no speed limit for certain classes of vehicles. Best known are Germany's less congested Autobahns where automobile drivers have no mandated maximum speed. Measurements from the German State of Brandenburg in 2006 show average speeds of 137 km/h (85 mph) on 4-lane sections, and 142 km/h (88 mph) on 6-lane sections, without mandatory speed limits. Rural areas on the Isle of Man, the Indian states of Andhra Pradesh and Maharashtra also lack speed limits, but speeds are lower when measured on those lower design roads.

An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally for the transport of people rather than goods.

The term motorcar has also been used in the context of electrified rail systems to denote a car which functions as a small locomotive but also provides space for passengers and baggage. These locomotive cars were often used on suburban routes by both interurban and intercity railroad systems.

There are approximately 600 million passenger cars worldwide (roughly one car per eleven people). Around the world, there were about 806 million cars and light trucks on the road in 2007; the engines of these burn over a billion cubic meters (260 billion US gallons) of petrol/gasoline and diesel fuel yearly. The numbers are increasing rapidly, especially in China and India.

Imogen Jennifer Jane Heap ( /ˈɪmədʒɨn ˈhiːp/; born 9 December 1977 in the London Borough of Havering) is a Grammy Award-winning English singer, composer and songwriter from Havering, Essex. She is known for her work as part of the musical duo Frou Frou and her solo albums, which she writes, produces, and mixes. She has produced three solo albums, the latest of which is 2009's Ellipse, which was a North American chart success and earned Heap two Grammy nominations, winning Best Engineered Album, Non-Classical.

For her solo work (as well as her work with Frou Frou and Acacia), Heap plays heavily produced and arranged singer-songwriter pop incorporating elements of rock, dance and electronica. As a guest player and collaborator she has played rock (Jeff Beck), hip-hop (Urban Species) and theatre/film music.

I just love crafting and shaping sounds. Actually, many of the sounds that I work with start off as organic instruments - guitar, piano, clarinet, etc. But I do love the rigidity of electronic drums... I would record live drums, and then I would spend a day editing them to take the life out of them. I like to breathe my own life into these sounds, and I do try to keep the 'air' in the music. Some people think electronic music is cold, but I think that has more to do with the people listening than the actual music itself.