Go Back  Bike Forums > Bike Forums > Advocacy & Safety
Reload this Page >

Speeding in School Zone Ticket & Fine

Advocacy & Safety Cyclists should expect and demand safe accommodation on every public road, just as do all other users. Discuss your bicycle advocacy and safety concerns here.

Speeding in School Zone Ticket & Fine

Old 10-30-13, 08:44 PM
  #26  
turbo1889
Transportation Cyclist
 
turbo1889's Avatar
 
Join Date: Aug 2011
Location: Montana U.S.A.
Posts: 1,206

Bikes: Too many to list, some I built myself including the frame. I "do" ~ Human-Only-Pedal-Powered-Cycles, Human-Electric-Hybrid-Cycles, Human-IC-Hybrid-Cycles, and one Human-IC-Electric-3way-Hybrid-Cycle

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by CB HI View Post
Cops are ticketing cyclists on a DOWN HILL.
Well, I must be not the normal then since I continue to pedal even when going downhill until I run out of gears and am spooled out and can't pedal fast enough to keep up. So even on the downhill I at least know that I'm going faster then my top gear even if I don't know exactly where I'm at.

As you might imagine I used to really burn up some pavement on the downhills my now totaled out road-bike with a 52t big chain-ring in the front and a 11t high gear in the rear. I'll let you figure the math on that one yourself:

27" old standard tires with 110-115 RPM cadence (just barely less then two full rotations a second on the pedals) being my total top out that is as fast as I could pedal in the highest gear going down a good enough hill and actually pushing into the pedals and not just spinning them.

Yah, that would be worth a ticket in a school zone, no doubt in my mind on that one.

Last edited by turbo1889; 10-30-13 at 08:52 PM.
turbo1889 is offline  
Old 10-30-13, 09:12 PM
  #27  
I-Like-To-Bike
Been Around Awhile
 
I-Like-To-Bike's Avatar
 
Join Date: Oct 2004
Location: Burlington Iowa
Posts: 27,731

Bikes: Vaterland and Ragazzi

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked 98 Times in 64 Posts
Originally Posted by dynaryder View Post
How can a cyclist tell the difference between 20 and 25mph?
Easy, a sensible cyclist will just slow down and not be a dumbbell in a school zone, otherwise, a cop may pull the speed boy cyclist over, then the cyclist will know exactly.
I-Like-To-Bike is offline  
Old 10-30-13, 09:24 PM
  #28  
dougmc
Senior Member
 
dougmc's Avatar
 
Join Date: Jul 2008
Location: Austin, TX
Posts: 3,030

Bikes: Giant OCR2, Bridgestone RB-T, Bike-E, Vision R-40, Novara Safari

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by CB HI View Post
Cops are ticketing cyclists on a DOWN HILL.
As long as you're pedalling and not coasting the same math applies. (And yes, I do realize that maybe they were coasting.)

In any event, the old adage still applies -- "Ignorance of the law is no excuse". (Sure, you know the law, but not your speed -- effectively the same difference.)

Not wanting to equip your bike with a speedometer and therefore being ignorant of your speed doesn't excuse your speeding.
dougmc is offline  
Old 10-30-13, 09:27 PM
  #29  
daihard 
Just a person on bike
 
daihard's Avatar
 
Join Date: Aug 2013
Location: Seattle, WA
Posts: 1,926

Bikes: Cannondale Synapse Carbon 3

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by ItsJustMe View Post
Actually at any given speed, cars can stop much faster than bikes.

I'm all for enforcing ALL the laws in school zones. Damned places are some of the most dangerous spots on the roads around.
Except that the elementary school in the article is very hard to see. I commute on Fremont Ave (the street mentioned in the article) from time to time. I never knew there was a school there until I read the article.

Oh, and FWIW, I am the cyclist who "stopped and asked if the man was OK."
__________________

The value of your life doesn't change based on the way you travel. - Dawn Schellenberg (SDOT)
daihard is offline  
Old 10-30-13, 11:04 PM
  #30  
dougmc
Senior Member
 
dougmc's Avatar
 
Join Date: Jul 2008
Location: Austin, TX
Posts: 3,030

Bikes: Giant OCR2, Bridgestone RB-T, Bike-E, Vision R-40, Novara Safari

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by daihard View Post
Except that the elementary school in the article is very hard to see. I commute on Fremont Ave (the street mentioned in the article) from time to time. I never knew there was a school there until I read the article.
No school zone signs?

If you have no way of knowing it's a school zone, you ought to be able to have the ticket dismissed. I don't know the laws in Washington, but here in Texas clearly visible signs are required for a reduced-speed school zone and if there's not signs it's not a reduced-speed school zone. And if this did happen, that a ticket was dismissed because there really wasn't appropriate signage -- the signs would go up very quickly afterwards.

Looking the area up on Google Street View, there are indeed school zone signs on Fremont that look almost exactly like the ones here -- very clear, with lights on them (presumably the lights are on while the school zone is in effect.)
dougmc is offline  
Old 10-30-13, 11:34 PM
  #31  
Chris516
24-Speed Machine
 
Chris516's Avatar
 
Join Date: Jul 2004
Location: Wash. Grove, MD
Posts: 6,058

Bikes: 2003 Specialized Allez 24-Speed Road Bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Never speed through a school zone.
Chris516 is offline  
Old 10-30-13, 11:46 PM
  #32  
CB HI
Cycle Year Round
 
CB HI's Avatar
 
Join Date: Mar 2005
Location: Honolulu, HI
Posts: 13,542
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 1246 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by turbo1889 View Post
Well, I must be not the normal then since I continue to pedal even when going downhill until I run out of gears and am spooled out and can't pedal fast enough to keep up. So even on the downhill I at least know that I'm going faster then my top gear even if I don't know exactly where I'm at.

As you might imagine I used to really burn up some pavement on the downhills my now totaled out road-bike with a 52t big chain-ring in the front and a 11t high gear in the rear. I'll let you figure the math on that one yourself:

27" old standard tires with 110-115 RPM cadence (just barely less then two full rotations a second on the pedals) being my total top out that is as fast as I could pedal in the highest gear going down a good enough hill and actually pushing into the pedals and not just spinning them.

Yah, that would be worth a ticket in a school zone, no doubt in my mind on that one.
Originally Posted by dougmc View Post
As long as you're pedalling and not coasting the same math applies. (And yes, I do realize that maybe they were coasting.)

In any event, the old adage still applies -- "Ignorance of the law is no excuse". (Sure, you know the law, but not your speed -- effectively the same difference.)

Not wanting to equip your bike with a speedometer and therefore being ignorant of your speed doesn't excuse your speeding.
And your cadence count speed calculation is still going to lag behind your actual speed because gravity down the hill is also adding acceleration.
__________________
Land of the Free, Because of the Brave.
CB HI is offline  
Old 10-31-13, 01:46 AM
  #33  
daihard 
Just a person on bike
 
daihard's Avatar
 
Join Date: Aug 2013
Location: Seattle, WA
Posts: 1,926

Bikes: Cannondale Synapse Carbon 3

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by dougmc View Post
Looking the area up on Google Street View, there are indeed school zone signs on Fremont that look almost exactly like the ones here -- very clear, with lights on them (presumably the lights are on while the school zone is in effect.)
You probably mean this?



I don't know. The sign is there, but it doesn't stand out all that much. Not to defend myself, but I usually notice school zone signs when they are there. I will ride that route tomorrow morning to double-check. Chances are, the trees around it may have more leaves now than when this street view picture was taken.
__________________

The value of your life doesn't change based on the way you travel. - Dawn Schellenberg (SDOT)
daihard is offline  
Old 10-31-13, 03:42 AM
  #34  
kjmillig
Senior Member
 
kjmillig's Avatar
 
Join Date: Aug 2006
Location: NE Texas
Posts: 1,122
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Still a school zone. Just like a stop sign obscured by trees is still a stop sign. MAYBE one can argue it in court, but I don't want to be that one.
kjmillig is offline  
Old 10-31-13, 04:30 AM
  #35  
HonestOne
Senior Member
 
HonestOne's Avatar
 
Join Date: Sep 2013
Posts: 70
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Around here, speed limit is 25mph by schools "while kids are present" or something like that. What's annoying is that they don't tell you when they are or are not present, or what time they get out of school... Aside from "safety", this just seems like another attempt for the PD to generate some new revenue.
And if some of you are going to try and use that logic of "if you are breaking the law, then you deserve a ticket", then you should tell Law Enforcement Officers that they must stop using the "spirit of the law". In other words, they can choose when to enforce laws and when not to, using your logic, they should always enforce the law and always give tickets, I doubt many of you are in support of that...
HonestOne is offline  
Old 10-31-13, 07:01 AM
  #36  
turbo1889
Transportation Cyclist
 
turbo1889's Avatar
 
Join Date: Aug 2011
Location: Montana U.S.A.
Posts: 1,206

Bikes: Too many to list, some I built myself including the frame. I "do" ~ Human-Only-Pedal-Powered-Cycles, Human-Electric-Hybrid-Cycles, Human-IC-Hybrid-Cycles, and one Human-IC-Electric-3way-Hybrid-Cycle

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Usually I'm not the one to disagree strongly with you CB HI since we tend to be on the same page a lot. But your wrong about the "acceleration leading" thing. So long as your keeping the chain tight and putting force into the pedals the pedals rotation speed is directly related through the gearing rotation to the rear wheel rotation speed which provided its in static rolling contact with the ground is directly relative to speed.

You are correct that once you run out of gears and you are going so fast down the hill that you cannot pedal fast enough to keep up and keep the chain tight and be pushing into the pedals and adding your own power of acceleration to the acceleration the hill is providing that you no longer can judge your specific speed by pedal cadence and gearing. But even then you at least know your going faster then you top gear at your maximum pedal cadence and unless your top gear is rather low and/or you have some physical limitation that prevents you from doing 100+ RPM on your cadence your going to be up to at least 25-mph-ish or better and that is with low mountain bike type gearing, road bike gearing can often get you in the high 30's or beyond in top gear at maximum pedal cadence and some people can even do it on the flat (not me, I can break out over the 20 barrier on the flat, how far over depends on the bike and how good I'm feeling that day but I can't break over the 30 barrier without a good down hill or very strong tail wind. If I had too to save my life in a "fight or flight" adrenaline rush I might be able to pull it off but not under normal circumstances unless I've got a hill and then I can really have some fun.

But that kind of fun is for the open road with good visibility on a road that is built for cars to go even faster, it isn't a safe or sane thing to do in a school zone with kids around for sure.
turbo1889 is offline  
Old 10-31-13, 07:17 AM
  #37  
rydabent
Senior Member
 
Join Date: Apr 2010
Location: Lincoln Ne
Posts: 7,540

Bikes: RANS Stratus TerraTrike Tour II

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 1339 Post(s)
Liked 31 Times in 21 Posts
Once again here the reason for this is not safety, it is to collect money for the city. It is looked at as a revenue stream.

However it is the law, and if the word gets out to cyclist, they need to slow down.

As I am typing this a question comes to mind. What if the cyclist is a 12 year old that has no money? Will the city jail him for not paying their blood money?
rydabent is offline  
Old 10-31-13, 07:24 AM
  #38  
dynodonn
Banned.
 
dynodonn's Avatar
 
Join Date: Dec 2006
Location: U.S. of A.
Posts: 7,465
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 1253 Post(s)
Liked 25 Times in 23 Posts
Originally Posted by rydabent View Post
As I am typing this a question comes to mind. What if the cyclist is a 12 year old that has no money? Will the city jail him for not paying their blood money?
Mom and dad will be subject to pay the fine. If there is any time to be served in lieu of not paying the fine, it will probably be in the form of community service.
dynodonn is offline  
Old 10-31-13, 07:36 AM
  #39  
dynodonn
Banned.
 
dynodonn's Avatar
 
Join Date: Dec 2006
Location: U.S. of A.
Posts: 7,465
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 1253 Post(s)
Liked 25 Times in 23 Posts
It's amazing to see that the fine for cyclists is nearly the same as a motorist, whereas a motorist is capable of inflicting injury many more times greater in a collision than a cyclist. One would think that city officials would want an even greater deterrent to keep motorist from speeding, or less of a deterrent for cycling.
dynodonn is offline  
Old 10-31-13, 10:29 AM
  #40  
spivonious
Senior Member
 
Join Date: Aug 2012
Location: Lancaster, PA, USA
Posts: 1,851

Bikes: 2012 Trek Allant, 2016 Bianchi Volpe Disc

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Fines aren't based on potential damage, they're based on deterring the violation.

I'm glad they're ticketing everyone on that road, and I hope they start doing it elsewhere. If you don't enforce the speed limit, then it's a waste of a sign.
spivonious is offline  
Old 10-31-13, 11:05 AM
  #41  
daihard 
Just a person on bike
 
daihard's Avatar
 
Join Date: Aug 2013
Location: Seattle, WA
Posts: 1,926

Bikes: Cannondale Synapse Carbon 3

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by kjmillig View Post
Still a school zone. Just like a stop sign obscured by trees is still a stop sign. MAYBE one can argue it in court, but I don't want to be that one.
Yes, I agree. I didn't bring up the potentially obstructed view of the sign in order to justify speeding in a school zone. I just believe that the signs should be made highly visible for the safety of the students. After all, that's what the school zone signs are for.

Now about the school zone sign above... I rode through the area this morning to check how visible the sign was. Surprisingly, it stood out fairly well, better than shown in the street view picture above, largely because the leaves had fallen off. So there, I don't think I'd be able to convince the judge if I were caught speeding there.
__________________

The value of your life doesn't change based on the way you travel. - Dawn Schellenberg (SDOT)
daihard is offline  
Old 10-31-13, 11:24 AM
  #42  
genec
genec
 
genec's Avatar
 
Join Date: Sep 2004
Location: West Coast
Posts: 26,348

Bikes: custom built, sannino, beachbike, giant trance x2

Mentioned: 32 Post(s)
Tagged: 0 Thread(s)
Quoted: 6542 Post(s)
Liked 108 Times in 71 Posts
Originally Posted by I-Like-To-Bike View Post
Easy, a sensible cyclist will just slow down and not be a dumbbell in a school zone, otherwise, a cop may pull the speed boy cyclist over, then the cyclist will know exactly.
+100... Agreed... one doesn't have to know exact speed to know enough to slow down.
genec is online now  
Old 10-31-13, 12:52 PM
  #43  
CB HI
Cycle Year Round
 
CB HI's Avatar
 
Join Date: Mar 2005
Location: Honolulu, HI
Posts: 13,542
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 1246 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by turbo1889 View Post
Usually I'm not the one to disagree strongly with you CB HI since we tend to be on the same page a lot. But your wrong about the "acceleration leading" thing. So long as your keeping the chain tight and putting force into the pedals the pedals rotation speed is directly related through the gearing rotation to the rear wheel rotation speed which provided its in static rolling contact with the ground is directly relative to speed.

You are correct that once you run out of gears and you are going so fast down the hill that you cannot pedal fast enough to keep up and keep the chain tight and be pushing into the pedals and adding your own power of acceleration to the acceleration the hill is providing that you no longer can judge your specific speed by pedal cadence and gearing. But even then you at least know your going faster then you top gear at your maximum pedal cadence and unless your top gear is rather low and/or you have some physical limitation that prevents you from doing 100+ RPM on your cadence your going to be up to at least 25-mph-ish or better and that is with low mountain bike type gearing, road bike gearing can often get you in the high 30's or beyond in top gear at maximum pedal cadence and some people can even do it on the flat (not me, I can break out over the 20 barrier on the flat, how far over depends on the bike and how good I'm feeling that day but I can't break over the 30 barrier without a good down hill or very strong tail wind. If I had too to save my life in a "fight or flight" adrenaline rush I might be able to pull it off but not under normal circumstances unless I've got a hill and then I can really have some fun.

But that kind of fun is for the open road with good visibility on a road that is built for cars to go even faster, it isn't a safe or sane thing to do in a school zone with kids around for sure.
If you count your cadence for ten seconds and say your speed it 20 mph based on cadence, that calculated speed is lower than the instantaneous speed at the end of the 10 seconds the cop reads on his laser unit because of the acceleration added by gravity on the down hill. If the cops are handing out tickets for 2 or even 3 mph over, that could be enough to snag you.

Do you have some method of instantaneously counting your cadence in the same amount of time a laser speed gun measures your speed?
__________________
Land of the Free, Because of the Brave.
CB HI is offline  
Old 10-31-13, 12:56 PM
  #44  
CB HI
Cycle Year Round
 
CB HI's Avatar
 
Join Date: Mar 2005
Location: Honolulu, HI
Posts: 13,542
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 1246 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by spivonious View Post
Fines aren't based on potential damage, they're based on deterring the violation.

I'm glad they're ticketing everyone on that road, and I hope they start doing it elsewhere. If you don't enforce the speed limit, then it's a waste of a sign.
Not true everywhere. Many locations have graduated fines based on how fast over the speed limit one is traveling because of the greater damage that the higher speed causes.
__________________
Land of the Free, Because of the Brave.
CB HI is offline  
Old 10-31-13, 01:01 PM
  #45  
ItsJustMe
Seņior Member
 
ItsJustMe's Avatar
 
Join Date: Sep 2005
Location: Michigan
Posts: 13,750

Bikes: Windsor Fens, Giant Seek 0 (2014, Alfine 8 + discs)

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 442 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by dynaryder View Post
I'm ok with slowing bikes down through a school zone,but they do need to have one of those signs that say how fast you're going. Bikes don't come standard with computers,and aren't legally required to have them. How can a cyclist tell the difference between 20 and 25mph?
It's not the responsibility of the municipality to provide you with the means to determine if you're obeying the law. Not having a speedo doesn't exempt you from being required to follow the law. If you think you might be going fast enough to break the law, then you should get the equipment you need or take a different route.
__________________
Work: the 8 hours that separates bike rides.
ItsJustMe is offline  
Old 10-31-13, 01:26 PM
  #46  
Consularrider
Senior Member
 
Consularrider's Avatar
 
Join Date: Dec 2007
Location: Frankfurt am Main, Germany/Arlington, VA
Posts: 494

Bikes: Surly Pugsley, Jamis Renegade, Kona Rove, Salsa Pistola, Raleigh M60, Raleigh Sport Touring Team USA

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by daihard View Post
Yes, I agree. I didn't bring up the potentially obstructed view of the sign in order to justify speeding in a school zone. I just believe that the signs should be made highly visible for the safety of the students. After all, that's what the school zone signs are for.

Now about the school zone sign above... I rode through the area this morning to check how visible the sign was. Surprisingly, it stood out fairly well, better than shown in the street view picture above, largely because the leaves had fallen off. So there, I don't think I'd be able to convince the judge if I were caught speeding there.
From the photo it looks like there are attached yellow lights that should be flashing when the reduced speed is in effect and those lights are not obscured. There also appears to be a bunch of verbage under the numbers that can't be read from the photo which may set that out.
Consularrider is offline  
Old 10-31-13, 01:42 PM
  #47  
B. Carfree
Senior Member
 
Join Date: Jan 2010
Location: Eugene, Oregon
Posts: 7,042
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 498 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by HonestOne View Post
And if some of you are going to try and use that logic of "if you are breaking the law, then you deserve a ticket", then you should tell Law Enforcement Officers that they must stop using the "spirit of the law". In other words, they can choose when to enforce laws and when not to, using your logic, they should always enforce the law and always give tickets, I doubt many of you are in support of that...
I would much prefer that law enforcement always enforce the law and write tickets for every violation they encounter. I briefly lived in a small city whose police department did just that and it was awesome. I've never been on such safe roads and it was no coincidence that this community became the bike capital of the world (while the enforcement lasted).
B. Carfree is offline  
Old 10-31-13, 02:00 PM
  #48  
daihard 
Just a person on bike
 
daihard's Avatar
 
Join Date: Aug 2013
Location: Seattle, WA
Posts: 1,926

Bikes: Cannondale Synapse Carbon 3

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Consularrider View Post
From the photo it looks like there are attached yellow lights that should be flashing when the reduced speed is in effect and those lights are not obscured. There also appears to be a bunch of verbage under the numbers that can't be read from the photo which may set that out.
Yes, the lights were flashing clearly this morning. Weird thing is, I didn't notice them yesterday either. I may just need to pay more attention!
__________________

The value of your life doesn't change based on the way you travel. - Dawn Schellenberg (SDOT)
daihard is offline  
Old 10-31-13, 02:21 PM
  #49  
dougmc
Senior Member
 
dougmc's Avatar
 
Join Date: Jul 2008
Location: Austin, TX
Posts: 3,030

Bikes: Giant OCR2, Bridgestone RB-T, Bike-E, Vision R-40, Novara Safari

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by CB HI View Post
Do you have some method of instantaneously counting your cadence in the same amount of time a laser speed gun measures your speed?
If it's really that difficult for you to estimate your speed on a hill, I'd suggest either 1) getting a cyclocomputer or 2) slowing way down so you're sure you're not exceeding the speed limit when you encounter a school zone.

If you want an *exact* speed at all times, get that computer. (Even that averages it over each rotation of your wheel, but it's close enough.) If you just need to estimate your speed from time to time, you generally get a feel for it (especially if you normally ride with a cyclocomputer and can compare how fast it feels that you're going to how fast you're really going) and while that feeling won't give you exact figures, it'll let you tell the difference between 20 and 25 mph. Personally I'd say that calculating your speed from your estimated cadence and gear ratio is more trouble than it's worth, but certainly the idea is sound, and it'll work any time you're pedalling and keeping the chain tight, hill or not.

And yes, if your speed changes during the period that you're counting your revolutions, it'll come up with an average speed over that interval rather than an instantaneous speed.

In any event, any even semi-experienced rider who actually cares about not breaking the speed limit in a school zone can generally keep their speed down low enough to not get a ticket if they bother, even if there's a hill. If they get a ticket, it's generally because they didn't care (or know) about the speed limit and were explicitly trying to go as fast as possible.
dougmc is offline  
Old 10-31-13, 05:58 PM
  #50  
dynaryder
PatronSaintOfDiscBrakes
 
dynaryder's Avatar
 
Join Date: Apr 2005
Location: BicycleSPACE warehouse in SW Washington DC
Posts: 6,980
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by dougmc View Post
Just to be clear, I don't think cars are generally required to have them either.
Not going to put real effort into this,but a few seconds Googling found this:

"Mopeds are required to have two mirrors, horn, brakes on all wheels, speedometer/odometer,"

If mopeds need them,pretty sure cars need them as well. I do know they checked your speedo during inspections in PA.

Originally Posted by turbo1889 View Post
That's an excellent question that I can answer for you. If you know your gears and your tire size you can calculate how fast you will be going in each gear by pedal cadence RPMs, a technique I personally and regularly use on
Between traffic,peds,and road conditions,I have way too many things to pay attention to than how fast I'm pedaling and what gear I'm in(esp given the pool of bikes I own). I really have zero need to know exactly how fast I'm going.
__________________

C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Dahon Speed Pro TT,Brompton S6L/S2E-X
dynaryder is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright Š 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.