F1 Fanatic

Here’s a source in Portuguese, with some pictures: http://globoesporte.globo.com/motor/formula-1/noticia/2012/11/interlagos-ganha-area-de-escape-no-s-do-senna-para-gp-do-brasil-de-f-1.html

The article in Portuguese says the drainage system is around the Senna S though, and it looks like the astroturf was installed at Descida do Lago. Also, I’d like to clarify that that they spent R$ 22 million… which is about £6.5 million or US$11 million.

I don’t like the trend of asphalt run offs, but Interlagos is by far the poorest circuit on the calendar (in terms of facilities of course, the track itself in my top 5), and as a Brazilian I’m happy they are trying to improve it, it would be a crying shame if it lost it’s place on the calendar because of its unsuitable facilities.

I really dislike these tarmac run-off areas – especially at the first turn. Just like Circuit Catalunya, Monza, Singapore and to some extent Monaco, drivers will cut the corner on lap 1. It takes away some of the excitement of the first corner. This in contrast to Albert-Park and Montreal where the drivers are force to stay on the track, often causing chaos in the midfield.

Someone once said that tarmac run-offs actually reverse the driver’s learning process to find the maximum grip at each corner of each track.

I. e. before tarmac run-offs became the norm, one would converge to the quickest way through a corner from ‘below’, i. e. slowly building up speed in the corner. While, of course, nowadays it’s still the predominant approach and sensible thing to do, there is – I think – less in the way of doing the opposite – take a bit too much and see if that’s enough. If not, back off a bit. But increasingly try to nail it from ‘above’.

Of course, limited tyre availability curbs this possibility back somewhat; it’s not so fun finishing a set of tyres trying to nail it from ‘above’ and flat spotting one by braking too late… But then again, precisely that’s what tarmac run-off is good for. Late on the breaks? No issues, don’t flat spot it, run wide instead, you will have no problems. So it’s controversial a bit.

Another thing: it does encourage overtakes, I think. While playing with the abrasiveness of tarmac run-offs could cut this back, I think it is a way higher incentive to try a risky pass. The worse you could end up with is a little tour on the run-off, but no gravel, sand or grass will mess up your tyres, aero elements, radiator, etc.

Of course the main argument is always safety, but that needs no explanation – barring brake failures, where one could argue that a gravel trap would be more effective in slowing the car down.

Bring in the Paul Ricard stripes, at least.

@guilherme No idea, road design isn’t my area. I could ask a friend though, who does design roads for a living

@raymondu999 – I started a thread on Paul Ricard’s abrasive run-off areas a while ago, and found out that they really were expensive.

The material used is a tungsten-asphalt mixture, which is very, very, very costly to obtain. Moreover, tungsten is apparently the only material that achieves the desired effect – other industrial-grade abrasives like ceramic aluminium oxide are either too expensive, or alter the chemical properties of the tarmac in an undesirable fashion – so there are no cheaper alternatives to consider (at least, until engineers come up with a suitable substitute).

For now, if track designers want a runoff surface that stops cars effectively in case of an accident, penalizes driver mistakes, and is cost effective, the tried and tested gravel/sand trap is, in my opinion, still the way to go.

Looks like they’ve still left a strip of grass between the exit kerb and the tarmac expanse, which I think is the best compromise.

Anyone who blows a braking zone will meet it head on, go straight over grass and have the tarmac to stop them. Anyone who tries to get greedy will dip a wheel onto the grass and spin.