I've been wondering if the new Korean style rolling barriers would gain acceptance in the US and other countries.
https://interestingengineering.com/innovation/this-new-korea...
Basics of Concrete Barriers (2000)
11–20 of 84 posts
Re: Basics of Concrete Barriers (2000)
#12Amazingly well thought out design. If you want something as impactful (hah) think about the fluid related mechanics of urinal and toilet design, and how much thought has to go into splashback. Jersey kerb has become ubiquitous worldwide. Interestingly, the alternate designs often used (guyed wires, steel barrier) have good and bad points, for survivability if an impact is unavoidable. They "give" -and in some circums…
> splashback I thought that is what the plastic filters at the bottom assisted with
They do, but well designed urinals have very little splash back even without the plastic filter.
Re: Basics of Concrete Barriers (2000)
#13I've been wondering if the new Korean style rolling barriers would gain acceptance in the US and other countries. https://interestingengineering.com/innovation/this-new-korea...
In the U.S. we're struggling to get them to understand that bike lanes and sidewalks can't just randomly end mid-block and still be useful. While the idea seems ostensibly solid, and cars very much need containment, we still have much more basic needs before we can start optimizing car infrastructure.
Re: Basics of Concrete Barriers (2000)
#14So, that little slope probably saved my life once.
I was trucking up 44 at a fairly moderate pace (I'm not a big speeder) around a curve when there was suddenly a car in my lane, so I jerked the wheel to the right lane ... where there was another car, I twitch back to the other lane and begin, well, hydroplaning or whatever it is when you have just a touch of rain to bring up the oil from the road. Brakes were not effective and I was headed right for the highway divider at somewhere between forty to fifty miles per hour, at a forty-five degree angle. In this flimsy little car, that corner impact is going to hit me pretty hard.
That's when I looked at the little slope at the base of the highway dividers and reasoned that if I could get my car parallel to the divider, the impact would be taken on the left wheels and the left side of the suspension, areas designed to bear some weight from that particular direction already. I managed to get the car aligned by tweaking the wheel direction, hit, slid for about ten or fifteen feet. I was so nearly perfect to parallel that I only lost the rubber covering to about an inch of bumper. Ended up replacing the tires a few weeks later just out of an abundance of caution, but otherwise fine.
(It turned out that there was a big wreck up around the curve and various drivers had decided to just sort of stop where they were, hence my surprise obstacles)
Re: Basics of Concrete Barriers (2000)
#15Ah! Always wondered why they called it a Jersey Barrier but had never looked it up.
Re: Basics of Concrete Barriers (2000)
#16I've been wondering if the new Korean style rolling barriers would gain acceptance in the US and other countries. https://interestingengineering.com/innovation/this-new-korea...
In the U.S. we're struggling to get them to understand that bike lanes and sidewalks can't just randomly end mid-block and still be useful. While the idea seems ostensibly solid, and cars very much need containment, we still have much more basic needs before we can start optimizing car infrastructure.
No, we can start improving car infrastructure right away because, on the types of roads that have guardrails, cars are like 98% of the traffic or more. And the rare roads that have both guardrails and sidewalks should probably have the sidewalks on the far side of the guardrails, at which point improved guardrails also protect pedestrians.
Purely from a safety standpoint, outright prohibiting bicycle traffic on motorized roads would be a massive improvement at the expense of inconveniencing a small minority of people (while improving the convenience for everyone else). I'm kind of surprised more states haven't done it yet. Failing that, it's probably better to also use guardrails to physically separate the bike lanes from the motor lanes, which is yet another use-case for improved guardrails.
Re: Basics of Concrete Barriers (2000)
#17[deleted]
Re: Basics of Concrete Barriers (2000)
#18If you're having trouble reading the diagrams, several barrier types are available in this New Zealand Transport Agency publication [1]. The F-shape barrier is detailed on page 10. [1] https://arco.co.nz/wp-content/uploads/2017/12/m23-road-safet...
Really cool. Is it just me or are metal wire barriers not very common in US road designs. They seem to be quite popular in Europe.
They were common in the US in many areas but are seen as a liability as it’s easy to install them wrong.
Re: Basics of Concrete Barriers (2000)
#19So, that little slope probably saved my life once. I was trucking up 44 at a fairly moderate pace (I'm not a big speeder) around a curve when there was suddenly a car in my lane, so I jerked the wheel to the right lane ... where there was another car, I twitch back to the other lane and begin, well, hydroplaning or whatever it is when you have just a touch of rain to bring up the oil from the road. Brakes were not ef…
I am glad you came out of that OK.
>> fairly moderate pace (I'm not a big speeder)
But you were speeding, right? On a wet roadway with what sounds like poor visibility.
Re: Basics of Concrete Barriers (2000)
#20Earlier quoted context omitted.
In the U.S. we're struggling to get them to understand that bike lanes and sidewalks can't just randomly end mid-block and still be useful. While the idea seems ostensibly solid, and cars very much need containment, we still have much more basic needs before we can start optimizing car infrastructure.
No, we can start improving car infrastructure right away because, on the types of roads that have guardrails, cars are like 98% of the traffic or more. And the rare roads that have both guardrails and sidewalks should probably have the sidewalks on the far side of the guardrails, at which point improved guardrails also protect pedestrians. Purely from a safety standpoint, outright prohibiting bicycle traffic on motor…
Same argument works for banning pedestrians from streets that cars use though. What kind of world are we trying to make here.