Common Questions About The M25
Question: When was the M25 built?
Answer: The M25 motorway was constructed between 1975 and 1986.
Question: How long is the M25 motorway?
Answer: The M25 motorway is 117 miles long (or 188 kilometres).
Question: Which other motorways does the M25 connect to?
Answer: The M25 motorway connects to 10 other motorways. See our
M25
junctions map for details.
Question: How many cars Use the M25 Motorway on a daily basis?
Answer: The M25 motorway was designed in the mid 1990’s to carry 100,000
vehicles a day. However, the busiest section between Junctions 13 and 14
carries around 200,000 vehicles a day.
Question: Is the M25 one of the busiest motorways in the UK?
Answer: The M25 is one of the businest motorways in Europe and certainly
in the UK.
Question: What is the busiest part of the M25 motorway?
Answer: The busiest M25 section is
Junctions 13 and 14 which are in the
Heathrow section on the western side of
the M25. With a lot of people working at
Heathrow or around the Heathrow area the
western side of the M25 can get
extremely busy and congested between 7am
and 10am and between 3.30pm and around
7.30pm on weekdays as Heathrow area
daytime workers commute to and from
work. Plus there are the 52 million
travellers flying to or from
Heathrow Airport every year
(excluding pure connecting flights)
which is approximately 145,000
passengers on average per day on around
900 daily fights.
Question: Who is responsible for
operating and maintaining the M25
motorway?
Answer: "Connect
Plus" is responsible for operating
amd maintaining the M25 motorway which
is a joint venture between Balfour
Beatty, Atkins and Egis. Connect plus
has a 30 year contract with Highways
England to manage and improve the M25
network on behalf of Highways England.