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Updated: 23 min 34 sec ago

Re: 50 mph for lorries

31 July 2014 - 9:43pm
Tonyf33 is not in the world I see in Norfolk and south Lincs, where it's the nutters who gallop up to roundabouts at sixty who don't have time to react and merge on smoothly and get in dangerous pickles, not Mr Forty mph behind a truck. There's a reason why the A17 and A15 have big red signs saying how deadly they are... and it's not because a few people hesitate: it's because a few pushy idiots don't realise a 60 limit doesn't mean all the road is always safe for 60.

Re: 50 mph for lorries

31 July 2014 - 9:08pm
Mark1978 wrote:....however a lot of dual carriageways are designed to be motorways and these should be redesignated as such.
But that would require expensive alternative routes/bridges etc for the road users who would be forbidden:
I suspect lowering the limit and fixing layouts dangerous to slow users (eg slip roads) would be cheaper. And perhaps making some sort of obvious (subconscious?) visual reminder that its an ordinary road containly slow or squishy road users.

Re: 50 mph for lorries

31 July 2014 - 9:02pm
I do agree with the principle that most drivers don't know or understand that there is any difference between a dual carriageway or a motorway.

A difference in speed limit would underline that ; however a lot of dual carriageways are designed to be motorways and these should be redesignated as such.

Re: 50 mph for lorries

31 July 2014 - 8:59pm
As this seems a fait acompli I would suggest that in return that the speed limits on single and dual carriageway public roads be reduced to 50 and 60mph respectively. On single carriageways that would reduce overtaking, and allow more time to see cyclists/pedestrians etc ahead. On dual carriageways it allow more time to see cyclists/pedestrians/etc ahead.

IMO 70mph is too fast for non-motorway roads shared with slow road users like pedestrians and cyclists, even at 60 mph preceding pedestrians/cyclists are approached quickly, 70 is asking for trouble IMO:
the requirement for flashing amber beacons on mobility scooters (rule 46 HWC) is an indication the dual carriageway ( a public road open to all) speed limit is too high.
It makes no sense to have the same limit on a dual carriage way and motorway.
Even 60mph probably deserves more concentration than is supplied by a lot of drivers.
Dual carriageways should be designed to make clear that they are not motorways and are just like a single carriage way except that overtaking involves no oncoming traffic: that should make them safer for slower traffic--- instead they are allowed to be more dangerous by allowing drivers to treat them as motorways !! Bahhh.

Also, the driver alone is responsible for their decision to overtake: I don't like this "it was partly their fault for driving at 40 in front of others" idea. 40mph isn't that painfully slow anyway. What about us cyclists: we're "slow"?

Should drivers unhappy at driving at 60 and overtaking everything possible (when properly safe of coarse) to maintain it be forced off the road, even if happy at 50/40? Would you rather the car behind your bike was doing 60 or less than 60?

I would prefer if the IAM and similar would concentrate more on patience and calmness than "making progress"?

Re: 50 mph for lorries

31 July 2014 - 8:43pm
Put it this way: if cycling on the road took 20 minutes but going by cyclepath took 30 minutes for the same distance, there would be plenty on here who would decry the path as being not fit for purpose and complain that segregationists didn't understand why people should always stay on the road....

Caught on camera

31 July 2014 - 8:26pm
Two weeks ago, the price of all my action camera kit finally paid off.
I was cycling to work and approaching a bend with high hedges, so you could not see round the bend. This White Transit came from behind at high speed and overtook me at the start of the bend..... Just as another car appeared the other way. I have a perfect recording of this car being forced off the road, then spinning out of control. The transit did not stop. The car driver was most pleased when I told him it was all videoed. The recordings are now with the Police, and his insurers, and my written Police statement was posted shortly afterwards.
Looking at the recordings that evening, I was greatly shocked by what I saw. I have no doubt that the car drivers quick action in going off the road prevented an offset head-on crash. If this had happened, I am in no doubt that I would not be telling you all about it. I would like to post the recordings for you all too see, but it's Police evidence and you can see the registration numbers, so I don't think that I should.
Oh I do so hope it goes to Court. I want my day in Court! I want to see this driver and give evidence against him.

Re: Camera question - what do you use

31 July 2014 - 8:20pm
I have two Muvi HD Camcorders by Veho. Both in their waterproof cases, one mounted on my helmet facing forwards, the other affixed to my seatpost facing rearward. Endurance is 2-3 hours. For those situations when I need to recharge the batteries when I am out, I also bought a 'Pebble' by Veho, it's a battery which will give several recharges to the cameras.
I have more to say on this, but have relegated it to a new topic.

Re: Bonnet surfing

31 July 2014 - 8:09pm
Glad to hear you're OK Bob and that things seem to be going the right way for you. I trust that there was shiny paint on your shoe cleats? The one time I did a spot of bonnet surfing, I had a good hold onto the wiper blades

Re: Ten Miles a Day

31 July 2014 - 7:40pm
By the way, I've just started a new spreadsheet including feet per mile per day.
I'm aiming for 1,300 feet per day for 2014.

1,263ft so far.
I need even more hills.

Re: Dissertation Birmingham Commuters

31 July 2014 - 7:37pm
regular commuters are pretty experienced by definition...

Re: 50 mph for lorries

31 July 2014 - 7:36pm
[XAP]Bob wrote:Vorpal wrote: it's only a few minutes difference in travel time.
But I am Mr Toad and must exploit the 155 mph limit of my car on all roads.

Going at 40 rather than 60 for 10 miles is a total time loss of just 5 minutes - but it *feels* like a 15 minute delay, because that's ho long the delay takes, not how long the delay is.

Traffic lights have a maximum cycle time of 120s in the UK (http://www.traffic-signal-design.com/te ... y_main.htm), although this is often reduced to 90s.
Let us assume an average of 100s and that 40% of the time they are on green.
40% of the time there is no delay on the road
60% of the time there is a delay between 60 and 0 seconds - i.e. an average of 30s.
That means the average delay from a traffic light is ~20 seconds - so passing through 3 traffic lights will delay you by ~a minute (on average)

The delay from each mile of following a vehicle at 40mph on an otherwise clear NSL road is approximately equivalent to passing *one* traffic light.

That's not an accurate representation of what happens in real life..your driver whom is happy to sit behind an HGV doing 40mph hesitates at every roundabout, slows down (even more) before other potential 'hazards' even when it is obvious the hazard doesn't present itself, even open bends with good sight lines the brake lights go on when doing just 40-45 down to 30-35. They just don't have the ability to plan their journey ahead even by a few metres or have rudimentary driving skills (like changing gear/braking/looking out the window & steering) that wouldn't get them anywhere near passing a driving test..they tend to be the ones that go through village 30 zones at the same 40mph speed as well!

So your 10 miles ends up with an accumulation of time far greater than that lost in just in a 40-60mph speed differential, it also means you have a large following of other motorvehicles all wanting to get somewhere, some getting impatient and as with all humans errors creep in, especially when people have had a hard days work, they're less alert/more tired, just wanting to get home and some herbert is sitting blindly oblivious to everything around them.
Classic case is the A15 from Lincoln to the M180 near Scawby, it's just over 20 miles long, on a good day you can do it in well under 25 minutes sticking to the speed limit as an absolute (there's a 50 zone near the airbase), there are days when I've being stuck behind drivers whom are reluctant to overtake HGVs the whole length and it's taken 40 to do the same journey.

IF a 10 minute journey takes you 20 for no other reason than someone just isn't capable of basic driving skills then that is frustrating for a very large proportion of people..

Re: 50 mph for lorries

31 July 2014 - 7:10pm
Ellieb wrote:^ so you appear to be saying that on a 20 mile rural journey, it is just like being stopped by traffic lights 20 times. That isn't really selling the idea to me of not overtaking even when it is safe and appropriate
Not stopped by, passing.

And given that you will rarely have a 20 mile stretch of road to follow them down as your entire journey it is rarely a significant proportion of the time spent on a journey.

Remember the limit is not a target.

Re: 50 mph for lorries

31 July 2014 - 7:04pm
^ so you appear to be saying that on a 20 mile rural journey, it is just like being stopped by traffic lights 20 times. That isn't really selling the idea to me of not overtaking even when it is safe and appropriate

Re: Bonnet surfing

31 July 2014 - 6:53pm
reohn2 wrote:Well at least he admits to it .
eventually ....

Re: Dissertation Birmingham Commuters

31 July 2014 - 6:16pm
Birmingham cycle commuters zip-clip razorblades under the peaks of their helmets.
Don't mess.

Re: Ten Miles a Day

31 July 2014 - 5:32pm
Think it would be a good idea to start another thread or resurect the old one on energy expenditure

Miles a day...........its probably how you do it and that would depend on what you are aiming for / just pleasure................

Re: Ten Miles a Day

31 July 2014 - 5:26pm
Having just bought a powermeter (from a forum member, thanks!) apparently I can pretty accurately measure my calorie burn using data from that. Haven't delved into that yet as the number of calories I'm burning while riding isn't high on my list of things to know. Would be interesting, but I don't want it to tell me to eat less cake...

Dissertation Birmingham Commuters

31 July 2014 - 4:47pm
Dear CTC Members

I am an undergraduate Human Geography Student at University of Leicester.

For my dissertation I am conducting research into the cause and effect of the conflict between cyclists and motorists in the context of commuter cyclists in Birmingham. To complete this I need 15-20 volunteers who regularly cycle a particular route, such as commuting to work. This research aims to study those of all abilities, levels of experience, and distances travelled.

Research participants would need to:
-be willing to be contacted by email
-fill out a report of their commute which would answer some specific questions about their experience.
-give me the directions of the route that they take (excluding the exact locations of home and work)

My study needs to be completed by 26/09/14. I have chosen to avoid face to face contact, as email contact gives the participant greater flexibility as to when they complete the above tasks.

I will guarantee that any personal information is kept confidential (safe on a password protected computer), and the research participant will be anonymous in the write up of the work.

My email address is jp334@student.le.ac.uk

I hope to hear from some of you soon.

Yours sincerely

Re: Bonnet surfing

31 July 2014 - 4:42pm
Well at least he admits to it .

Re: Ten Miles a Day

31 July 2014 - 4:12pm
That was exactly my thought about HR.
I don't use it nowadays, and rely on my computer working it out from the GPX track.
As it happens, I have records of all my rides since I went to Garmins.

I have a favourite ride, and have done it exactly 49 times with a Garmin since Feb 2008.
30miles with 2,900ft of ascent.

Calories varied wildly with HR input. Highest 2,473 and lowest 1,634 with all levels in between. 41 rides with HR.
Since doing away with HR, the figure is much more constant. Highest 1,489 and lowest 1,428. 8 rides without HR.

Personally, I believe the "without HR" more than "with HR", as the computer works out the energy required to lift my bulk+bike up and down the hills at the speed I do it. It cannot vary very much.


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