Might that need much work at all? Here's the current satellite picture.
Thanks for your addition.
Seems that they won't demolish the permanent grandstand, they'll just remove the barrier next to the track and use the area in front of the grandstand as runoff. As the runoff is marked with grey, it's possibly tarmac. The new runoff might possibly mean there isn't space for the temporary grandstand of Curva do Cafe.
Looks exactly like that, it's a really bad drawing because some items are juxtaposed but by the satellite pic you can see that jus moving the barriers back might be enough.
Maybe a how of seats could be lost but nothing more than that.
The temporary grand stand could even be a smaller one.
The pit entry seems somewaht similar to '98 pit entry. (1:25) The only difference seems to be that in the proposal the pit lane starts before Curva do Cafe, in '98 the pitlane started just before the chicane, but there was the white line at Curva do Cafe. But the chicane already exists, anyway. But, I wonder if F1 will use that pit entry chicane.
The chicane already exists indeed, but it's entrance besides being prolonged is thought to be widened.
This is the main concern as this could mean dealing with the banking there.
This changes are planed to happen next year, before the Brazilian GP.
WEC round at Interlagos is pending confirmation mainly because of this changes on the track that may still be on their way at September next year.
Edited by highdownforce, 16 November 2011 - 12:28.