These existed on the M25 for a while but they sold off the barrier moving vehicle. Some were installed installed on the M20. https://www.highwaysindustry.com/moveab ... n-the-m20/dyqik wrote: ↑Tue Jan 28, 2020 10:03 pm
The US highways that do this do it by having a string of concrete barriers that a special equipped vehicle can move from one side of the shared lanes to the other in the middle of the day/night.
The other method is to have HOV/express lanes that are separated from the main lanes in both sides, and which are only open to toll-paying/vehicles with 2 or more passengers, and which can be closed for each direction as appropriate.
Smart motorways are (not) more dangerous
- Boustrophedon
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Re: Smart motorways are (not) more dangerous
Remember it's only a coup if it's from the coup d'état region of France, otherwise it just sparkling white terrorism.
- bob sterman
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Re: Smart motorways are (not) more dangerous
True. But on many A-road sections there is a grassy "soft shoulder" that you stand a good chance of being able to get most of your car onto. Whereas on new smart motorways with all lane running there is a crash barrier to prevent vehicles leaving the carriageway.sTeamTraen wrote: ↑Fri Jan 29, 2021 6:27 pmIn the UK you also have a lot of major trunk A-roads with the same 70mph speed limit as motorways, no hard shoulder, bicycles and milk floats allowed (IIRC - maybe only sometimes?), and vehicles joining from stop signs coming out of little side at 90 degrees.![]()
No idea whether lack of crash barriers and an accessible "soft shoulder" (perhaps with trees to crash into) is on balance a safer alternative - but it does give you the option of leaving the carriageway.
Re: Smart motorways are (not) more dangerous
Driving down a smart motorway this morning there was someone parked up on the grass verge at the side. Luckily there was a verge at that point.
I know this is vitriol, no solution, spleen venting, but I feel better having screamed, don’t you?