biker jk wrote:Not quite, a tread pattern makes no difference to grip in the wet according to Sheldon Brown:GTPilot wrote:
Indeed, but only in dry conditions.
sigh....
Postby GTPilot » Sat May 17, 2014 9:44 pm
biker jk wrote:Not quite, a tread pattern makes no difference to grip in the wet according to Sheldon Brown:GTPilot wrote:
Indeed, but only in dry conditions.
Postby leximack » Sat May 17, 2014 11:27 pm
Postby rogan » Sun May 18, 2014 8:43 pm
Yes, it's not a bump. I'm no expert on the physics, but I can say when there is no friction whatsoever between your front wheel and the ground, the physics keeping you upright completely change, even if just for an instant. I doubt whether that is true aquaplaning. Not in Sydney, but in other parts of the world they get black ice, which causes similar problems. The expansion joints are even more slippery than most access cover plates, they seem to be polished steel.queequeg wrote:it has nothing to do with hydro planing. Basically the surface is so slippery that the tyre has no grip, no matter what type of tyre it is. Try riding over those awful steel cover plates you find when road works are being done. They are lethal, and this is pretty much what the expansion joints are made of.
Other items that cause tyres to lose grip include "purple ice" (aka Jacaranda Flowers). They make me more nervous than the expansion joints.
Postby duncanm » Sun May 18, 2014 9:19 pm
Postby queequeg » Mon May 19, 2014 12:00 am
Postby Barb1013 » Wed May 21, 2014 7:31 am
Postby duncanm » Wed May 21, 2014 12:33 pm
Postby Boognoss » Wed May 21, 2014 12:40 pm
Postby Summernight » Wed May 21, 2014 3:04 pm
Postby Mulger bill » Thu May 22, 2014 12:45 am
Postby Strawburger » Thu May 22, 2014 8:00 am
Closing an urban motorway for night works is a big deal, not something they want to do unless it's critical! An entry or exit ramp means setting up diversions, alternate accesses, traffic controllers, noise & lighting approvals, community engagement just to name a few things.Summernight wrote:How hard is it for the road authority to go out with a bit of sandpaper (or whatever they need) and roughen up/pitt the metal surface to stop the issues caused by smooth metal?
Or does that cause too much rusting? Is there some sort of sticky rubber or something that can be placed over the top that stops the slippage?
Postby Boognoss » Thu May 22, 2014 9:13 am
Strawburger, this particular expansion joint is on Beecroft Rd itself. It just happens to be the bridge that crosses over the M2 motorway so I think it would be RMS responsibility? Happy to stand corrected.Strawburger wrote:Closing an urban motorway for night works is a big deal, not something they want to do unless it's critical! An entry or exit ramp means setting up diversions, alternate accesses, traffic controllers, noise & lighting approvals, community engagement just to name a few things.Summernight wrote:How hard is it for the road authority to go out with a bit of sandpaper (or whatever they need) and roughen up/pitt the metal surface to stop the issues caused by smooth metal?
Or does that cause too much rusting? Is there some sort of sticky rubber or something that can be placed over the top that stops the slippage?
Don't forget the RMS do not operate the m2, transurban do.http://www.hillsm2.com.au/contact.htm" onclick="window.open(this.href);return false;
The argument to transurban will be "is this a critical maintenance issue". If you can pair it with scheduled maintenance works or another flawed area nearby then you have a chance something will be done.
You can also state that a critical or severe bicycle accident on the ramp will stop traffic, hence their revenues will be down on days where there are accidents.
Postby Summernight » Thu May 22, 2014 9:29 am
Here in Melbourne they've been regularly closing the tolled tunnels and parts of the Western Freeway on weekends for a while now doing re-surfacing works or something or other. I know it is a big deal, but if people are getting regularly injured by a known problem I would think that is classified as 'critical maintenance'.Strawburger wrote:Closing an urban motorway for night works is a big deal, not something they want to do unless it's critical! An entry or exit ramp means setting up diversions, alternate accesses, traffic controllers, noise & lighting approvals, community engagement just to name a few things.Summernight wrote:How hard is it for the road authority to go out with a bit of sandpaper (or whatever they need) and roughen up/pitt the metal surface to stop the issues caused by smooth metal?
Or does that cause too much rusting? Is there some sort of sticky rubber or something that can be placed over the top that stops the slippage?
Postby Strawburger » Thu May 22, 2014 1:19 pm
Postby Strawburger » Thu May 22, 2014 1:48 pm
Postby 39x25 » Fri May 23, 2014 7:43 am
Postby Barb1013 » Wed Jun 25, 2014 8:02 am
Postby herzog » Wed Jun 25, 2014 8:21 am
Postby Xplora » Wed Jun 25, 2014 10:41 am
Really glad to hear that you're on the mend, and that you've started the process to get the problem resolved.Barb1013 wrote: As a footnote my doctor also told me that I was very lucky not to be brain damaged (even wearing the helmet). Having just come back from my home country of England I noticed that so many cyclists out there do not wear helmets (they are MAD!!) and to see the way they cycle in London I am not surprised about the number of them being injured.....
I shall be back on the bike next week but will NEVER use this stretch again (I will be crossing over at the lights before and riding down the footpat, then crossing back over).
Postby Barb1013 » Thu Jun 26, 2014 8:14 am
Postby wombatK » Thu Jun 26, 2014 8:59 am
Postby trek52 » Fri Jun 27, 2014 7:17 pm
Postby Xplora » Fri Jun 27, 2014 7:40 pm
Postby queequeg » Fri Jun 27, 2014 8:17 pm
Postby Barb1013 » Sun Jun 29, 2014 6:28 pm
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