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Traffic Matters

Posted: Mon Aug 13, 2018 11:42 am
by boycott
Limassol police booked 109 motorists for various traffic code violations during a 12-hour crackdown aiming at preventing fatal and serious traffic incidents, it was announced on Saturday.

According to police, during the crackdown that started on Friday afternoon and ended early on Saturday morning, officers, focusing mainly on the coastal area, booked 47 drivers for speeding and 16 for drink driving.

Other offences included driving without a seatbelt, using a mobile phone, driving without insurance, and without a valid driver’s licence.Police also reported 38 motorcyclists, 13 of whom had no crash helmet. The rest were booked for not having valid insurance or driving’s licence.
https://cyprus-mail.com/2018/08/11/over ... -12-hours/

Seems like a good crackdown, 16 booked for drink driving and 38 motor cycles booked, good work and well done methinks.

Re: Traffic Matters

Posted: Mon Aug 13, 2018 11:45 am
by memory man
If you are booked for drink driving, I presume you cannot drive your car home.
Someone ( who hasn't been drinking ) would have to drive it home for you!!

Re: Traffic Matters

Posted: Mon Aug 13, 2018 6:06 pm
by Fisherman Phil
memory man wrote: Mon Aug 13, 2018 11:45 am If you are booked for drink driving, I presume you cannot drive your car home.
Someone ( who hasn't been drinking ) would have to drive it home for you!!
I don't know, but it wouldn't surprise me if in Cyprus, they book you for drink driving, then let you drive home!

Re: Traffic Matters

Posted: Mon Aug 13, 2018 6:28 pm
by trevnhil
I thought that I had read once that they do that..

Re: Traffic Matters

Posted: Mon Aug 13, 2018 7:31 pm
by Kili01
Which all helps to explain a general low standard of driving here... I am surprised that so many serious driving offences seem to be taken quite lightly. It would improve road safety and even driver education/ awareness, if police were always on the watch for offenders and prosecutions followed the more serious ones.

Dee

Re: Traffic Matters

Posted: Tue Aug 14, 2018 1:46 pm
by Lazydaze52
My OH got a speeding fine the other week in Paphos. On going to the bank to pay the fine we found that the penalty points had been put on my license due to the car being registered in both our names and the police recorded the first named owner rather than the details from OH’s driving license. This has been referred to Nicosia to have corrected (I hope!)

So if you get pulled over, double check your ticket to make sure it refers to the correct driving license.

Re: Traffic Matters

Posted: Mon Aug 20, 2018 12:58 pm
by Jim B
I don't think it's feasable to get that sort of accuracy with a speed camera. I know the speeds shown on my cars and Garmin never match and the faster I go the greater the difference. I would think the Garmin is more accurate as it's obtaining the speed by calculating against fixed points so would suggest most speedometers on cars are inaccurate.

Jim

Re: Traffic Matters

Posted: Mon Aug 20, 2018 2:24 pm
by Devil
Jim B wrote: Mon Aug 20, 2018 12:58 pm I don't think it's feasable to get that sort of accuracy with a speed camera. I know the speeds shown on my cars and Garmin never match and the faster I go the greater the difference. I would think the Garmin is more accurate as it's obtaining the speed by calculating against fixed points so would suggest most speedometers on cars are inaccurate.

Jim
All speedometers on cars are optimistic by law. I no longer remember the tolerances but I think that the regulations state between one and 10 percent. In practice, they are usually optimistic by about 5 percent. That means that if they show you are doing 100 kilometres per hour, you are actually doing about 95, give or take an ounce or two. At a steady speed on a straight road, a GPS can be considered as very accurate. However, there is always a slight delay when there is a change of direction or speed before it catches up with the new conditions.

I don't know about this country but, in Switzerland, the device used in speed traps has to be shown to be accurate (within a given tolerance) before and after the speed trap has been set up. The protocol of accuracy has to be available in court, if demanded. I'm not sure about handheld devices as there will be deviations according to the difference in the angle of the beam and the direction that the car is travelling. This is called the cosine effect and may lead to errors in practice of less than 5 km/h, more typically 2 km/h. This is one of the reasons why there is always a tolerance in the recorded speed.

Re: Traffic Matters

Posted: Mon Aug 20, 2018 2:33 pm
by boycott
The below is from - https://www.thecarexpert.co.uk/how-accu ... eedometer/

The law for car speedometers in the UK
The UK law is based on the EU standard, with some minor changes. A speedo must never show less than the actual speed, and must never show more than 110% of actual speed + 6.25mph. So if your true speed is 40mph, your speedo could legally be reading up to 50.25mph but never less than 40mph. Or to put it another way, if your speedo is reading 50mph, you won’t be doing more than 50mph but it’s possible you might actually only be travelling at 40mph.
To ensure that they comply with the law and make sure that their speedometers are never showing less than true speed under any foreseeable circumstances, car manufacturers will normally deliberately calibrate their speedos to read ‘high’ by a certain amount. As your satnav is not the designated device by which a car’s speed is measured, it does not need to incorporate any fudge factoring.

This shown below is from, suspect that some will understand it but is it really written in understandable English? - https://en.wikipedia.org/wiki/Speedometer

Most speedometers have tolerances of some ±10%, mainly due to variations in tire diameter. Sources of error due to tire diameter variations are wear, temperature, pressure, vehicle load, and nominal tire size. Vehicle manufacturers usually calibrate speedometers to read high by an amount equal to the average error, to ensure that their speedometers never indicate a lower speed than the actual speed of the vehicle, to ensure they are not liable for drivers violating speed limits.
Excessive speedometer error after manufacture can come from several causes but most commonly is due to nonstandard tire diameter, in which case the error is
Percentage error = 100 × ( 1 − new diameter / standard diameter ) {\displaystyle {\mbox{Percentage error}}=100\times (1-{\mbox{new diameter}}/{\mbox{standard diameter}})}

Nearly all tires now have their size shown as "T/A_W" on the side of the tire (See: Tire code), and the tire's
Diameter in millimetres = 2 × T × A / 100 + W × 25.4 {\displaystyle {\mbox{Diameter in millimetres}}=2\times T\times A/100+W\times 25.4}

Diameter in inches = T × A / 1270 + W {\displaystyle {\mbox{Diameter in inches}}=T\times A/1270+W}

For example, a standard tire is "185/70R14" with diameter = 2*185*(70/100)+(14*25.4) = 614.6 mm (185x70/1270 + 14 = 24.20 in). Another is "195/50R15" with 2*195*(50/100)+(15*25.4) = 576.0 mm (195x50/1270 + 15 = 22.68 in). Replacing the first tire (and wheels) with the second (on 15" = 381 mm wheels), a speedometer reads 100 * (1-(576/614.6)) = 100 * (1 - 22.68/24.20) = 6.28% higher than the actual speed. At an actual speed of 100 km/h (60 mph), the speedometer will indicate 100 x 1.0628 = 106.28 km/h (60 * 1.0628 = 63.77 mph), approximately.
In the case of wear, a new "185/70R14" tyre of 620 mm (24.4 inch) diameter will have ~8 mm tread depth, at legal limit this reduces to 1.6 mm, the difference being 12.8 mm in diameter or 0.5 inches which is 2% in 620 mm (24.4 inches).

Re: Traffic Matters

Posted: Mon Aug 20, 2018 2:36 pm
by boycott
IF you accept the info from The Car Expert, the way I understand it is that your speedo reading should always be higher than you are actually travelling at i.e. the speedo shows 50mph but your real speed is 40mph nut never the other way round.

Re: Traffic Matters

Posted: Mon Aug 20, 2018 4:13 pm
by Jim B
That's what I was thinking; its not possible to calibrate a mobile speed gun to be 100% accurate. I've spent my working life involved in calibrating measurement instruments and we have always had +/- tolerances even on the test equipment. There are only the point to point over a measured distance speed cameras that could provide the accuracy required to catch a driver exceeding the limit by 1 mile per hour.
I recall the point to point type being used on the M62 at Burtonwood when they built new slip roads and bridges to access the local shopping area; they reckon the fines paid for all the roadworks as drivers were slowing down and then speeding up once they passed the first cameras.

Jim