Drivers will have to be aware of a new kerb which has been installed at the apex of the Turn 16 and Turn 17 long right-hander at the Circuit of the Americas in order to prevent corner cutting.
In the final laps of the 2017 event, Max Verstappen took to the inside apron to pass Ferrari's Kimi Raikkonen as the pair battled for the final spot on the podium.
The stewards deemed the pass was completed off the track and handed a five-second penalty to the Dutchman on the cool-down lap. Verstappen was unaware of the penalty until he was told in the podium cool-down room.
The new kerb will be two metres long, one metre wide and will be 50 millimetres high to try and prevent drivers from taking too much kerb on the inside and cutting the corner.
The Austin circuit will retain two DRS zones, the first of which begins 250 metres after the exit of Turn 11, with its detection point 150m prior to Turn 10.
The second DRS zone will start 80 metres after the exit of the final corner, with the detection point 65 metres on the exit of Turn 18.
