Could the M25 be widened to 16 lanes?

Picture from stock

Picture from stock

First published in News Watford Observer: Photograph of the Author by , Chief Reporter

Proposals have been mooted to make the M25 a 16-lane motorway if Heathrow airport gets its contentious third runway.

Bosses in charge of the airport revealed plans to widen the stretch between Junctions 14 and 15 to accommodate the extra congestion the expansion would bring.

The suggestion was made in Heathrow’s final plan for the third runway, which was submitted to the Government.

Under the proposals the construction work on the motorway would take four years and be ready for 2021.

Comments (5)

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5:53pm Tue 13 May 14

cameluk says...

Most drivers can't drive in the correct lane in the current 8 lane sections and are even worse in the 12 lane section by Heathrow now. Expanding it to 16 lanes will leave the inside lanes completely empty while everyone sticks to the current lanes 4 and 5 even when the rest of the road is void of any traffic
Most drivers can't drive in the correct lane in the current 8 lane sections and are even worse in the 12 lane section by Heathrow now. Expanding it to 16 lanes will leave the inside lanes completely empty while everyone sticks to the current lanes 4 and 5 even when the rest of the road is void of any traffic cameluk
  • Score: 7

6:12pm Tue 13 May 14

croxley46 says...

Ridiculous idea! It would be like the freeways in California - we haven't got the room and it would cost too much in construction and purchase of land costs, let alone all the upheaval .
Ridiculous idea! It would be like the freeways in California - we haven't got the room and it would cost too much in construction and purchase of land costs, let alone all the upheaval . croxley46
  • Score: 3

12:09pm Wed 14 May 14

garston tony says...

As croxley points out widening the motorway doesnt necessarily mean there wont be traffic. Isnt there going to be a bottle neck when it goes from 16 down to 8 or 6 anyway which would back up potentially into the wider bit?

Its not popular but havent studies shown reducing the limit to 40 actually improves the flow and overal journey times? Why not do that instead, be cheaper and could be started immediately
As croxley points out widening the motorway doesnt necessarily mean there wont be traffic. Isnt there going to be a bottle neck when it goes from 16 down to 8 or 6 anyway which would back up potentially into the wider bit? Its not popular but havent studies shown reducing the limit to 40 actually improves the flow and overal journey times? Why not do that instead, be cheaper and could be started immediately garston tony
  • Score: 1

2:05pm Thu 15 May 14

Keefer says...

"Keep Left Unless Overtaking" should be made an endorsable offence and would probably have more effect than widening to 30 lanes, because you still get the arrogant drivers that hog the two outside lanes pottering along at 60mph.

Carrot first, then Stick would be more appropriate - beat seven bells out of anyone that refuses to comply after two warnings & rip their license up in front of them.
"Keep Left Unless Overtaking" should be made an endorsable offence and would probably have more effect than widening to 30 lanes, because you still get the arrogant drivers that hog the two outside lanes pottering along at 60mph. Carrot first, then Stick would be more appropriate - beat seven bells out of anyone that refuses to comply after two warnings & rip their license up in front of them. Keefer
  • Score: -1

2:06pm Thu 15 May 14

Keefer says...

...you may have noticed, I feel strongly about outside lane hogs.
...you may have noticed, I feel strongly about outside lane hogs. Keefer
  • Score: -1

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