Plans developed into a single ring motorway, now just called the M25, and work began in 1975. It passes through five counties: Kent, Surrey, Buckinghamshire, Hertfordshire and Essex and was built in a series of sections.
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You're Not Part of the MotorwayOverall, the M25 passes through six counties including Surrey, Berkshire, Buckinghamshire, Hertfordshire, Essex, and Kent.
well to be honest, Its always busy on the M25, and severely worse during the rush 6-10am, 3-7pm. 5am is a good time to start out but you'll still pick up conjestion further on. So expect the worse, and keep your fingers crossed, make sure you listen our for traffic alerts on the car radio.
Junctions and servicesThe M25 has been criticised for having too many junctions; 14 of them serve only local roads. In 2016, Edmund King, president of the Automobile Association, attributed congestion on the M25 to excessive junctions.