Cars used to rejoin the track from the pits on the outside of turn one, leaving them vulnerable if a car entering the corner had to run wide.
This year the pit lane exit will run through the turn one run-off area, moving the flow of pit exit traffic further away from the racing line.
Other improvements have also been made to the track, mainly to the run-off areas and exit kerbs.
Last year Lewis Hamilton’s race was spoiled when a large piece of artificial grass became attached to his car. According to the FIA the material has been replaced at turns one, three, ten, thirteen and fifteen with a “more hard-wearing product”.
Asphalt has been applied to the verges at some corners to make the run-off spaces more durable. And ‘sausage’ kerbs have been installed at turns four, five, nine, eleven, thirteen and fourteen to discourage corner-cutting.
2013 Korean Grand Prix
Image via F1_Korea on Twitter