I blew a red light

[Parbs]

Travis wrote:
> BrettS wrote:
>
>> So, did he say what riders of carbon fibre bikes are supposed to do?
>
> Get a steel bike.
>

No need to go that far I find a well placed metal cleat works very well.

Parbs

 

[BrettS]

Travis wrote:

> BrettS wrote:
>
>
>>So, did he say what riders of carbon fibre bikes are supposed to do?
>
>
> Get a steel bike.
>
> Travis
>

Hehehe. Wait until China and India use all the steel for themselves and
we start using plastic cars...

--
BrettS

 

[Boostland]

"Duncan" <[email protected]> wrote in message
news:[email protected]...
> Ok,
>
> this morning I blew a red light.
>

Spits or Swallows ?

 

[Gemma_k]

"HughMann" <[email protected]> wrote in message
news:[email protected]...
> AFIK the loops work on resonance and not magnetic/metal detecting. An
> object in the loop should be detected it just needs mass. Aparently a
> sack of spuds in the loop should be detected.
>

'Resonance'? Do I have to hum the right tune to get the lights to change?
Hee hee!

errr...no.

The loops sense a change in the eletromagnetic field in the coils of wire
which make up the loop. Your sack of spuds just won't work at all I'm
afraid.

For all those that didn't go to their physics classes...
http://www.humantransport.org/bicycledriving/library/signals/detection.htm
http://www.humantransport.org/bicycledriving/library/signals/green.htm

Other methods of detection are Microwave and Video, microwave usually on
pedestrian crossings.... but we won't go there!

Gemm

 

[Bleve]

Boostland wrote:
> "Duncan" <[email protected]> wrote in message
> news:[email protected]...
> > Ok,
> >
> > this morning I blew a red light.
> >
>
> Spits or Swallows ?

gargles

 

[Gemma_k]

"TimC" <[email protected]> wrote in =

message news:<slrn-0.9.7.4-32479-25349-200609041835- was=20

>=20

> Wouldn't some kind of strain gauge be more reliable?

No, cause loops will last 30yrs, how long to you reckon a strain gauge =

will last?!

> Or just a button that you could wheel your bike over

>=20

That's what push buttons are for. They also serve as things to hang =

onto while you wait. And, a secret suprise is that if it's a big =

intersection, and the bike button is pressed, you might actually get a =

longer green time to allow you to clear the intersection....

> > Also remember that if you're on a minor side road, sometimes the =

phasing is

> > set to skip your turn (even if you have been detected).

> > And, just being detected and then moving off the loop to the side of =

the

> > road won't help either. You have to stay on the loop, or else it =

cancels

> > the call.

>=20

> Assuming that the person waiting has run the red?

>=20

or has gone somewhere else. Or a false call.

Gemm

 

[Duncan]

Gemma_k wrote:
> "HughMann" <[email protected]> wrote in message
> news:[email protected]...
> > AFIK the loops work on resonance and not magnetic/metal detecting. An
> > object in the loop should be detected it just needs mass. Aparently a
> > sack of spuds in the loop should be detected.
> >
>
> 'Resonance'? Do I have to hum the right tune to get the lights to change?
> Hee hee!
>
> errr...no.
>
> The loops sense a change in the eletromagnetic field in the coils of wire
> which make up the loop. Your sack of spuds just won't work at all I'm
> afraid.

I think Hugh was alluding to the change in resonant frequency of the
sensor loop (inductive loop + sensor circuit).. as per your links.

I think a sack of spuds won't work, but only because the spuds are
seperate (think laminated transformer cores).. if you mashed them all
together, they may well trip the circuit.

 

[TimC]

On 2006-09-05, Gemma_k (aka Bruce)
was almost, but not quite, entirely unlike tea:
> "TimC" <[email protected]> wrote in =
>
> message news:<slrn-0.9.7.4-32479-25349-200609041835- was=20
>
>>=20
>
>> Wouldn't some kind of strain gauge be more reliable?
>
> No, cause loops will last 30yrs, how long to you reckon a strain gauge =
>
> will last?!

Dunno, but the road surface is going to be dug up at least every 10
years anyway, isn't it? Or at least, I'd wish that they'd dig up and
replace Camberwell Road.

>> Or just a button that you could wheel your bike over
>
>>=20
>
> That's what push buttons are for. They also serve as things to hang =
>
> onto while you wait. And, a secret suprise is that if it's a big =
>
> intersection, and the bike button is pressed, you might actually get a =
>
> longer green time to allow you to clear the intersection....

I've yet to see one of these bike buttons. Are they convenient to
reach without placing yourself in the gutter?

--
TimC
The gedanken experiment failed. I couldn't reproduce the results -- TimC

 

[warrwych]

On 2006-09-05, Gemma_k (aka Bruce)
was almost, but not quite, entirely unlike tea:
> "TimC" <[email protected]> wrote in =
>
> message news:<slrn-0.9.7.4-32479-25349-200609041835- was=20
>
>>=20
>
>> Wouldn't some kind of strain gauge be more reliable?
>
> No, cause loops will last 30yrs, how long to you reckon a strain gauge =
>
> will last?!

Dunno, but the road surface is going to be dug up at least every 10
years anyway, isn't it? Or at least, I'd wish that they'd dig up and
replace Camberwell Road.

>> Or just a button that you could wheel your bike over
>
>>=20
>
> That's what push buttons are for. They also serve as things to hang =
>
> onto while you wait. And, a secret suprise is that if it's a big =
>
> intersection, and the bike button is pressed, you might actually get a =
>
> longer green time to allow you to clear the intersection....

I've yet to see one of these bike buttons. Are they convenient to
reach without placing yourself in the gutter?

--
TimC
The gedanken experiment failed. I couldn't reproduce the results -- TimC

I have seen them for horse riders - appropriately placed at horse rider height (wonder how they determined that ie height of shetland pony plus height of draft horse /2??)

 

[Bleve]

[email protected] wrote:
> Gemma_k wrote:
> > "Duncan" <[email protected]> wrote in message
> > news:[email protected]...
> > >
> > > DaveB wrote:
> > > > What type of frame have you got. I have always had probs with my old alu
> > > > frame but not with steel MTB or my OCR2 (whatever that is amde of).
> > >
> > > I suspect this is the problem... the frame's an old giant CFR (carbon
> > > w/ Al lugs); I guess the BB, spokes & pedals just aren't enough mass of
> > > ferrous to detect.
> > >
> > *sigh*
> > Trust me, it will only detect your wheels..... won't matter what frame you
> > have. If it won't detect your aluminium or steel rims, it ain't working
> > properly. If you are riding around of carbon Campy Boras or Zipps, you
> > won't be detected, they are a conductor but are actually 'lossy' and confuse
> > the loop.
> > I don't know if your loops are the same as SA's but you have to be in the
> > middle, on the double section of the loop. ie standing in the oil patch.
> > Look, here's one prepared earlier:
> > http://www.transport.sa.gov.au/safety/road/road_use/cyclists_and_traffic_signals.asp
>
> The loop at the exit to the garage at work requires me either to ride
> along the edge of the (square) loop or if the direction of ttravel is
> perpendicular WRT the loop wires, stop on the loop and twitch the
> handlebars to make it react[1]. Can you identify where the sensor is?
>
> best wishes
> james
>
> [1] Alu rims, alu frame

spokes made from?

 

[Gemma_k]

"TimC" <[email protected]> wrote in message
news:[email protected]...
> Dunno, but the road surface is going to be dug up at least every 10
> years anyway, isn't it? Or at least, I'd wish that they'd dig up and
> replace Camberwell Road.

A good one should last 30...

> I've yet to see one of these bike buttons. Are they convenient to
> reach without placing yourself in the gutter?
>
Not always. They are usually on corner islands and get you quite a long way
past the stop bar to reach them So you get an extra head start on the
rest of the traffic. They're always within reach so if you're game you
don't need to unclip to reach them (I've got long arms though) ;-)
I forgot the rest of Australia is a bit slow in installing these!

Gemm

 

[Theo Bekkers]

"Gemma_k" wrote
> "TimC" wrote

> > Dunno, but the road surface is going to be dug up at least every
10
> > years anyway, isn't it? Or at least, I'd wish that they'd dig up
and
> > replace Camberwell Road.

> A good one should last 30...

The idiots rebuilt Gt Northern Hwy just south of Bullsbrook, WA. Laid
the bitumen 6 weeks ago. Now they're digging it up to fix it.

30 years indeed!

Theo

 

[Gemma_k]

"Duncan" <[email protected]> wrote in message
news:[email protected]...
>
> Gemma_k wrote:
>> "HughMann" <[email protected]> wrote in
>> message
>> news:[email protected]...
>> > AFIK the loops work on resonance and not magnetic/metal detecting. An
>> > object in the loop should be detected it just needs mass. Aparently a
>> > sack of spuds in the loop should be detected.
>> >
>>
>> 'Resonance'? Do I have to hum the right tune to get the lights to
>> change?
>> Hee hee!
>>
>> errr...no.
>>
>> The loops sense a change in the eletromagnetic field in the coils of wire
>> which make up the loop. Your sack of spuds just won't work at all I'm
>> afraid.
>
> I think Hugh was alluding to the change in resonant frequency of the
> sensor loop (inductive loop + sensor circuit).. as per your links.
>
> I think a sack of spuds won't work, but only because the spuds are
> seperate (think laminated transformer cores).. if you mashed them all
> together, they may well trip the circuit.
>
If it was set that sensitive, it's probably pick up the bus on the other
side of the road. ;-)