I also love the tall concrete wall cause the officer can't pull a U and run around to flash his lights on after he gets you with the spectre.
It is absolutely necessary in Major Cities.
A transport can go through the grass like nothing. The QEW is scary they still have those wood posts with the aluminum, or w.e it is.
A big transport can fly through that like nothing, many have died like this in head on collisions.
Theres one for you guys who love the speed kills argument. If a transport truck goes through the median and hits your car head on what happens at the following speeds????
a) 90 km/hr
b) 110 km/hr
c) 130 km/hr
d) 150 km/hr
e) Your just as dead.
Well ya chances are even if it hits you at 70 head on your dead the speed wont make a difference. The answer was e.
Now d was a trick question. Why may you ask cause fantino would have towed his truck before his day in court 
Sometimes out west of london there is enough room to have a large grass median int he middle.
but in most urban areas there is simply no room for this.
I would rather have the concrete in the middle to stop trucks from flying through, with wider lanes, and perhaps a chance to expand the highway to fit another lane as opposed to something cops can use front facing radar to pull a U turn to catch speeders.
I remember that guy who went 250 on the 400. With grass in the middle or wood he could have flew threw that and hit me head on.
With a big concrete median he can smash his own car into a big slab of concrete and kill himself.