Cruising at a specific speed - on the motorway - Mapmaker
So far as possible, I stick to 70mph +/- 1mph. Drivers who speed up and slow down the whole time interrupt free flow of traffic. They are also very irritating; you start to overtake them; they speed up; you drop in behind; they slow down; you start to overtake them etc.

I find I have no trouble at all at cruising at a specified speed. Strangely, nor do other drivers when average speed cameras are around. It does not require me to stare at my speedo the entire time. Traffic flows extremely well in 50mph average speed zones. I suggest average speed cameras for the entirety of our network.
Cruising at a specific speed - on the motorway - OldSock
This becomes even more apparent when using cruise control, in my experience.
Cruising at a specific speed - on the motorway - Bill Payer
Yep - set if for 70ish and you end up overtaking and then being overtaken by the same vehicle. The really annoying thing is that I'm sure they think it's me that's messing about.
Cruising at a specific speed - on the motorway - moulder
I agree - annoys the hell out of me too. You can almost plan your overtaking with some people as you know they will not maintain ther speed on a slight incline!

Maybe we find it easy for technical reasons? my Throttle is fly by wire and I reckon the computer notices no foot movement and then autmatically keeps the speed the same when cruising.
Cruising at a specific speed - on the motorway - ForumNeedsModerating
I set the CC at most non-ambient speed, if that makes sense. Most cars seem do 60mph or
70mph, most trucks 55-60mph (variation od speed limiter I suppose) , so, wanting to do the least work, I cruise usually at 65mph. This means I overtake trucks & slower cars, but get overtaken by those hovering around 70mph. It avoids trucks doing their moving road block impressions & their fovever overtaking manoeuvres if you travel too slowly. I dip into lane 3 for the ocassional nip past lane 2 obstructions. Although criticised here, people speeding up (esp. on declines, but sometimes inclines too) & slowing down are usally those in older or less specified non-CC vehicles, so can be forgiven to some extent.

On longer hills, you can anticipate lots of speed variation & lane changing, I find a prolonged blast in lane 3 at 75 (inidicated) clears these nicely, then settle back to previous regime.
(noting not to pull in front of any cars doing more than 65 mph)

All the above numbers may move up or down en bloc of course, depending on road weather conditions etc.
Cruising at a specific speed - on the motorway - BobbyG
I recently got a car with CC for the first time and second a lot of the opinions on here.

But another aspect is that prior to having CC, I would tailor my driving (perhaps unaware though) to other cars. So if I was on a deserted motorway and a car overtook me, I would increase my speed trying to catch him up. If there was a car in front going slower, then I would increase my speed to overtake.

However with CC, I find myself sometimes doing the lorry thing, overtaking another car at 1mph difference (though not when I would block other vehicles) and anticipating overtaking manoeuvres a lot more in advance so that I don't need to touch pedals.
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2007 Seat Altea XL 2.0 TDI (140) Stylance
2005 Skoda Fabia vrS
Cruising at a specific speed - on the motorway - OldSock
The trouble is, Bobby, if you accelerate a little to pass at 5mph, what do you do once past? By pulling in left and lifting off (back to your original cruise) it will appear that you're 'slowing down immediately after overtaking' - as the overtakee will no doubt have speeded up slightly as you went past!
Cruising at a specific speed - on the motorway - BobbyG
Exactly! Thats why as long as I am not blocking the road then I will just casually inch pass until clear.
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2007 Seat Altea XL 2.0 TDI (140) Stylance
2005 Skoda Fabia vrS
Cruising at a specific speed - on the motorway - Lud
I have only once done much mileage in a car with CC (a Mercedes 280C in France in the eighties). I didn't like the surge when you turned the thing on and seldom drove for more than a minute without having to override the CC for traffic reasons.

Seems to me that obsessively trying never to touch the pedals is likely to lead to trouble. Inching past other cars is bad practice anyway, even when there's no traffic to speak of. And it may become a habit, and occur when there's a lot of traffic and constitute an obstruction.

Getting used to all these bells and whistles, and adapting your driving to them, seems to me a bad thing. Driving is complicated enough to start with. All this decadent kit doesn't make it any simpler, despite what people may think.

Cruising at a specific speed - on the motorway - ForumNeedsModerating
DaveA - I think it can use more fuel than a feather-footed look ahead type of driving style. When I really try to cruise economically (without CC & driving as above) I anticipate declines & inclines & make a better job of gently cresting inclines & lifting-off throttle for declines - the CC is blind of course, so sometimes 'surges' unnecesssarily just before a crest, likewise it holds the throttle until the 'edge' of any decline. It also tends to make more 'fuss' of any slight dip in speed & over eggs its response - again using slightly more fuel.
Cruising at a specific speed - on the motorway - DaveA
I'm now driving a car with CC for the first time. Since it is also my first diesel I've suddenly started watching fuel use as well. I've come to the conclusion that CC uses more fuel - switching off CC and keeping the same speed on the flat I see the economy indicator (I know it is just an indicator, not accurate) shows better economy. And start going downhill, where I can lift my foot a little to maintain the same speed, I see much better economy indicated. But when CC is on there is no change. Is this normal for CC?

Cheers,
Dave

BTW, 320d E46.
Cruising at a specific speed - on the motorway - doctorchris
Worst offenders for speeding up and slowing down are drivers of knackered vans that can only manage 50-60 mph uphill but who feel they must do 80 mph on the level and downhill. Eventually, when on an uphill stretch, I abandon my intended 70 mph for a stretch to leave them a few miles behind to play their childish game.
Cruising at a specific speed - on the motorway - Lud
So, doctorchris, drivers of 'knackered old vans' should go at 50 all the time to avoid inconveniencing anal types who are trying not to touch the pedals for as long as possible, like children trying not to tread on the gaps between paving stones?

Since when was trying to get a move on in a 'knackered old van' on an inconveniently hilly bit of motorway a 'childish game'?

A bit more respect for 'knackered old vans' and their 'knackered old drivers' if you don't mind.

Set your CC at 85 and only the Astras and Sprinters will be impeding your stately imperial progress.

:o{
Cruising at a specific speed - on the motorway - doctorchris
You missed my point. If these vehicles cannot cope with 70mph uphill then they are dangerous nuisances doing 80mph+ downhill, and exceeding the legal speed limit. I don't have CC, I have a Panda 4x4, max speed 90mph, I want to cruise at a constant, legal 70 mph and don't want these vans trying to creep past me on the flat, pull in too close, only for me to have to overtake them on the next incline.
I can't imagine that their travelling at 80 mph for short distances makes a scrap of difference to their journey times but it sure annoys me.
Cruising at a specific speed - on the motorway - Lud
Of course I understood you perfectly dc. If you insist on driving at the same average speed as these knackered old vans, but without the same spread owing to your vehicle's superior performance, they are bound to annoy you by passing you downhill and then falling back uphill.

The solution for you is to go faster. Or, if you must, slower.

Whether you want to or not has nothing to do with it. If you don't like knackered old vans buzzing round your ears, go faster than them. Or slower.

See? Easy.
Cruising at a specific speed - on the motorway - Mapmaker
>behind to play their childish game

Eh? I suggest you have a drive of one of these beasts. Many vehicles are unable to maintain the speed limit on uphill stretches. I'm sure you'd complain even more if (on a single carriageway road) they kept to the same speed on the downhill stretches.


Interestnig the numbers who use CC. I don't have it, but am perfectly capable of maintaining a steady speed whilst being able to look out ahead too.
Cruising at a specific speed - on the motorway - ForumNeedsModerating
A little CC envy creeping in here perhaps. Those that can get to grips with this danged new fangled technology find it quite useful I'm sure. It takes a bit of that unconcious competitiveness out of the equation when driving - as noted by those who found themselves or others speeding up when overtaken etc. & or trying to catch-up with the next car in front all the time.

Knackered vans? I'm sure there's a very good case for taking them of the road altogether. They tend to make up for their deficiencies by tailgating on declines & hogging lane 3 on inclines, holding everyone else up!

Cruising at a specific speed - on the motorway - Lud
There's no problem with the technology. I haven't driven far in this country with CC switched on, but I would expect (unless on an empty or nearly empty motorway) to have to override the thing often, as I did in France.

One of the things CC does to annoy me is to back off down hills, when as any fule kno a steady throttle opening allowing speed to creep up downhill is more satisfying and quicker actually, without being especially extravagant on fuel.

I suppose judicious use of this device may give an intelligent driver a couple of MPG, at the cost of a couple of mph. But it seems a fussy and annoying thing to me in practice, so far at least.

And by the way, what is all this 'knackered old van' fascism?

Edited by Lud on 23/10/2007 at 16:54

Cruising at a specific speed - on the motorway - BobbyG
The beauty of CC is, as the name suggests, is the ability to maintain a set speed. So in summer when I was travelling from Glasgow to Dover, CC was set at 76mph (GPS speed). By doing that I did not need to worry bout speed cameras, indeed was able to cruise past them whilst everyone else think they need to slow down to 60mph!

Remember its not unknown for cameras to be at the bottom of hills where you will have increased your speed with normal driving. Its also not unknown to be caught speeding because you had accelerated to overtake someone. Thus the reason for crawling past at +1mph if need be, still keeps me within the speed tolerance level.

Without Cruise, I have in the past found myself speeding on this journey, possibly up to the ton in places. This year I found the journey a lot more relaxing as I was not watching out for cameras and police instead of watching the road. And although it took longer than normal, fuel consumption was better and I didn't need to arrive any earlier anyway!
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2007 Seat Altea XL 2.0 TDI (140) Stylance
2005 Skoda Fabia vrS

Edited by BobbyG on 23/10/2007 at 17:04

Cruising at a specific speed - on the motorway - Mapmaker
Lud

I suspect CC makes for thirsty cars. I've only once ever driven a car with him, and didn't much like his style on our busy roads, he was forever too fast or too slow. When faced with an incline, he would put his foot down hard, which goes against all sensible economical driving style.

Sensible economical driving style does involve slowing down a little on steep hills.
Cruising at a specific speed - on the motorway - ForumNeedsModerating
One of the things CC does to annoy me is to back off down hills..

Agreed. In fact in a couple of cars with CC I've had, actually dropped a gear trying to slow down on v. steep declines! The new 'distronic' types with a widget to allow for unfettered 'econo-cruising' downhill would be nice..


And by the way, what is all this 'knackered old van' fascism?

Ha ha..no not really, I was just being mischievous & a bit TiCH ;)

Cruising at a specific speed - on the motorway - b308
I've found that on average Cruise is more economical than non-c, if you just want to keep the same speed, and it involves a lot less hassle than driving the car over long distances!

One thing I would say is that how economical it is depends on the type of CC you have.

I had a "manual" (ie non-electric) after market version fitted to a Vectra and then to a Fabia and that varied its speed by 1/2mph either side of the set speed - also it did not drive with the throttle "off" when going downhill. My latest car, another Fabia Estate, has the factory fitted version and the difference is noticable - if I am going downhill the throttle is off and the computer tells me I am using no fuel, just like I would do if I was driving it myself.

Going back to the speed - I am another that tends to drive at 65/66 on our busy motorways, its a lot less hassle and contantly slowing/speeding up when trying to drive at 70/75!
Cruising at a specific speed - on the motorway - Bill Payer
One of the things CC does to annoy me is to back off down hills
when as any fule kno a steady throttle opening allowing speed to creep up downhill
is more satisfying and quicker actually without being especially extravagant on fuel.

On most systems you can apply a bit of throttle to gain some speed and then back off to the set speed without doing anything else. This can throw you if you drive faster for a while and then try to slow down - I wish european cars has a CC on indicator as US cars do.

I suspect CC would annoy you more if it let your speed creep up and you got nicked for speeding - hiding at the bottom of the hill near my house is Scamera vans favourite spot.
Cruising at a specific speed - on the motorway - bignick2
only time I have ever had CC was on an old Austin 1100 - broke the accelerator cable whilst some distance from home. Bodged roadside repair using the choke cable which was the pull and twist to lock type. Result manual throttle with locking mechanism.

New cable installed the following morning but was an interesting drive home.

Back on topic now -- I find on motorway journeys that I pay only cursory attention to my speed. If in heavy but fast moving traffic I leave a comfortable gap ahead of me and regulate my speed to maintain it which CC cannot do.

On clear motorways I tend to cruise at 2,500 - 3,000 rpm and that equates to between 60-80 most of the time depending on gradients.
Cruising at a specific speed - on the motorway - Glaikit Wee Scunner {P}
My experience of using CC with a Toyota in the USA leads me to suspect it is no use on long steepish 'downgrades'. The force of gravity overcame the CC attempts to slow down and the speed crept up necessitating a manual 'down shift'.
Doncha love US English.
Cruising at a specific speed - on the motorway - tyro
Interesting thread. I'm not that good at keeping to a specific speed on the motorway. Like some others, I vary my speed quite a bit according to traffic.

I don't have cruise control myself, but have driven a few hired cars with it in France and the USA - and when I have a car with cruise, I do tend to use it, and keep pretty well to speed. I like it, but agree with others that in hilly territory, it is not so good - and in such circumstances I tend to turn it off.

I'm just back from the USA, and one thing I noticed there was that on interstates and other 4-lane highways, almost everybody is driving on cruise control. Furthermore, almost everyone has their cruise control set at about the same speed - usually somewhere between 65 and 70 mph. As a result, one can drive for miles without overtaking or being overtaken. And, as BobbyG has noticed, a lot of the overtaking is not exactly swift. It makes for a relaxing drive, though some people might find it rather boring.

Cruising at a specific speed - on the motorway - Dipstick
" This can throw you if you drive faster for a while and then try to slow down - I wish european cars has a CC on indicator as US cars do."

That's interesting. My last five cars have all had cruise (couldn't be without it) and I've driven a similar number of others with cruise over the last ten years or so - and not one of them hasn't had a "cruise on" indicator of some sort.
Cruising at a specific speed - on the motorway - daveyjp
VAG cars I've driven have a "cruise on" indicator - a small speedo with an arrow pointing to the dial. Symbol is in yellow and housed in the speedo along with high beam, traction off etc etc.

The problem with CC on hills is they can't anticipate, so at the bottom of a steep hill it slows slightly before applying gas to maintain speed. Being human I can apply the gas before it's required and maintain speed.
Cruising at a specific speed - on the motorway - doctorchris
Back in the late 70's I drove a Ford A series with a seriously heavy body and dismal aerodynamics. OK, it was new but may as well have been 20 years old and the company's Bedford was much faster. I know what "slow van " means but back then I just drove at the speed it could manage, kept to the speed limit, avoided annoying other road users and still managed my deliveries on time.
Cruising at a specific speed - on the motorway - P3t3r
So far as possible I stick to 70mph +/- 1mph. Drivers who speed up and
slow down the whole time interrupt free flow of traffic. They are also very irritating;
you start to overtake them; they speed up; you drop in behind; they slow down;
you start to overtake them etc.
I find I have no trouble at all at cruising at a specified speed. Strangely
nor do other drivers when average speed cameras are around. It does not require me
to stare at my speedo the entire time. Traffic flows extremely well in 50mph average
speed zones. I suggest average speed cameras for the entirety of our network.


I agree with the first paragraph, but not with the second. With average speed limits everything is a big mess. People drive very badly, and things can get very slow. They drive far too close, overtake on both sides, and some seem to insist on never dropping below 50mph. It really amazes me how bad they can drive when it's a relatively slow speed.
Cruising at a specific speed - on the motorway - MichaelR
I love the ones who speed up when you go alongside then, but very subtly.

So you've got your cruise set to XYZmph, minding your own business, move into the outside lane to pass a slower car and.. he matches your speed.

You now have 3 choices:

a) Speed up. Grrr. why should I?
b) Slow down. Grrr. why should I?
c) End up stick in the outside lane like a turkey.
Cruising at a specific speed - on the motorway - L'escargot
Sometimes you have to accelerate. If I'm in the left hand lane and catching up a slower vehicle and there's a faster vehicle behind in the next lane I sometimes accelerate to overtake the slower vehicle without inconveniencing the faster vehicle. Once I've overtaken I pull back into the left hand lane and slow down to my previous speed. What's wrong with that?
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L\'escargot.
Cruising at a specific speed - on the motorway - DP
Since we bought the Scenic I have discovered there are a hell of a lot of drivers out there who take offence at being overtaken by a people carrier. This is demonstrated either by accelerating as you overtake, or by pulling straight out behind you and then hammering past as you pull back in.

I used to get the same to a lesser extent when I was using SWMBO's Fiesta as a daily driver.

I cannot remember the last time this happened in the Mondeo. I genuinely don't think the car even registers with people. It blends in. Which I like a lot.

Cheers
DP
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04 Grand Scenic 1.9 dCi Dynamique
00 Mondeo 1.8TD LX
Cruising at a specific speed - on the motorway - MichaelR
If you are cruising at 70mph it's probably illegal for a start.
Cruising at a specific speed - on the motorway - tack
I use my speed limiter a lot, rather than cruise control. On motorway, set it to 70 then ease off when necessary and speed up to 70 again when able. Saves a lot of flicking around with cruise control. Limiter has a full pedal travel over-ride if necessary. I rather like it and it saves having to peer at your speedo all the time in scamera infested areas.