Showing posts with label Motorway. Show all posts
Showing posts with label Motorway. Show all posts

Tuesday, 29 April 2008

Strange behaviour

When I had my Honda Preludes I used to drive with the fastest flowing part of motorway traffic. I was careful, observant and only occasionally the fastest driver of any group (much better to let someone else attract the attention of the Police). Long journeys always felt shorter and more pleasant when I was making progress. From time to time I was irritated by those who would not do as I (try to) do and keep left when not overtaking but everyone suffers because of them. Times and circumstances changed and the Prelude was replaced by my first Citroen BX, the 1.9 litre automatic. It was a long-legged car, typically French in that it gathered speed slowly but felt as though it could sustain high speeds all day. Respect for the car's great age and the lower level of performance available caused me to drive more slowly in the Citroen than I did in the Honda. Journeys took a bit longer but it was something I (grudgingly) accepted. Now I have a 1400cc Citroen BX which is slower than the old BX. As a result my cruising speed on the motorway has dropped considerably. In the old BX I'd keep the speedometer between 70 and 80mph, in the new car it is more likely to be 60-70. Not only does this have an impact on the time it takes to make a long journey but I have noticed something new about the so-called Middle Lane Owners Club. While I am passing a convoy of slower I will try and do it as quickly as possible but there are drivers who will sit right on my tail, clearly wanting to go more quickly, even when there is a clear overtaking lane to the right. Only once I pull over to the left do they drive past but they don't pull over into the clear left-hand lane.

Sunday, 30 December 2007

After the journey

The BX and I survived the 300 mile round trip to see my family over Christmas. It was not, by any stretch of the imagination a pleasant journey but it was an instructive one. The backache that sets in after 15 minutes gets no worse and is soon forgotten at the end of the journey. The engine feels perfectly happy at 70mph and even for occasional stretches at 80; Citroën claimed the BX14 could do 100mph and it feels like it still could. The vibrations through the steering past 80 were enough to put me off trying; at some point I must get the front wheels balanced. Cruising at 70-80 is also an expensive business as I estimate the fuel consumption is no better than 32mpg at those speeds, staying between 60 and 70 is much more economical but does increase journey times. I also checked the speedo accuracy against the emergency telephones (roughly 1 mile apart) and at 60 I would estimate the speedo at about 5% fast. On the homeward leg of the journey I cot caught in a traffic jam and I discovered that my car does not like extended periods of ticking over and crawling along. The idle speed starts to fluctuate and pulling away feels erratic. When I opened the driver’s window I could smell petrol so I wonder if the carburettor needs adjustment.

Wednesday, 12 September 2007

Green Driving

The environmentalists are at it again. The world is under threat because some people choose to do 80 on the motorway rather than the legally permitted 70. This apparently produces a third more CO2 which will cause the Earth to warm up until it can no longer support human life. Or it’ll cause more extreme weather and hot places will get hotter while cool places get cooler. The more you listen the clearer it becomes that no-one knows what will happen but everyone is happy to predict doom and gloom.

None of the news reporters, none of the lobbyists, no one at all has paused to consider what they are actually saying. Man made emissions account for a small amount of atmospheric CO2. Of that the UK is responsible for a tiny percentage. Transport might account for a large proportion of the UK’s carbon dioxide but remember transport is more than just cars and how much CO2 can be accounted for by cars exceeding the motorway speed limit as opposed to crawling through towns? The term “a drop in the ocean” barely seems adequate to express the magnitude the saving if the environmentalists get their way.

Anyone who makes long motorway journeys must have noticed that they are about the most economical (in terms of mpg) car journeys while driving in town use the most fuel. Where safe I treat the motorway limit as a guideline rather than an absolute rule (as most do). On long journeys it saves time, which is far more important than saving money. The amount of fuel needed to maintain steady motorway speeds is tiny even if doing 80mph produces a third more carbon dioxide than 70 (itself an unsound, one size fits all approximation) it is a third more of a tiny number.

Rather than trying to slow down motorway traffic the campaigners would be better advised to look elsewhere to make changes. If fuel consumption is at its worst in urban environments why not look at what can be done there to improve matters? Rather than having traffic stationary, burning fuel and going nowhere, try to keep the traffic flowing. Urban air quality would improve, people would be less frustrated, fewer precious resources (fuel and time in particular) would be wasted and less CO2 would be released into the atmosphere. Steve Cropley said much the same thing in this week’s Autocar. Of course if you want to stick to 70mph on the motorway feel free; just remember to keep left so other traffic can flow freely past.

Thursday, 30 August 2007

Weekend fun

I took the opportunity to get away for the bank holiday weekend (25th – 27th), to visit friends and watch some motor racing. The weekend started with a trek up the M6, which invited a number of observations.

1. The M6 toll is a wonderful road, beautifully surfaced and it seems to attract well behaved drivers. Everyone keeps left, everyone seems content to travel at their own pace, no one crowds and no one seems aggressive.

2. The M6 toll should be extended north. The way the traffic stopped dead at the end of the toll section brings you back down to earth with a metaphorical bump. It seems that the M6 northbound cannot cope with the traffic from the toll road rejoining.

3. Congestion is self-limiting to a certain extent. The overhead signs warned of congestion for some distance surrounding the junction I needed. However, thanks to a little local knowledge I was able to come off a junction before the hold-up and follow an alternative route. When a road becomes known for slow or stationary traffic people will, wherever possible, modify their journey time or route to find a less congested alternative.

4. Our roads work very well. Even with the traffic as bad as it was my journey from Warwick to Urmston (not far from Old Trafford) took no more than two hours 15 minutes. That’s only 15 minutes more than I would expect the journey to take on a clear motorway.

My improvised route took me through the outskirts of Crewe. I know Bentley is based in Crewe so I was not surprised to see signs offering direction to the factory (although I always associate Rolls-Royce with Crewe even if BMW would rather I didn’t). What did astonish me was that the last of the signs I saw directed people to both the local recycling centre (rubbish dump) and Bentley. It seemed so incongruous that I was tempted to stop and photograph the sign, I suppose it illustrates the old saying, “where there’s muck, there’s brass”!