As reported before the season, the first five races of 2023 would see changes to the DRS zones, either extensions or reductions, in order to better balance overtaking.
In Miami the first two of three DRS zones have had their activation points moved further up the road.
The first DRS activation point on the flat-out run to Turn 11 has been pushed back from 30m after Turn 9 to 105m after the corner, reducing the DRS zone by 75 metres.
The second DRS zone on the back straight has also been shortened by 75 metres and now starts 525m after Turn 16 instead of 450m.
The final DRS zone onto the short start/finish straight, which has had a negligible effect on overtaking anyway, has been left untouched.
The tweaks have been made on a circuit-by-circuit basis and are therefore not related to the DRS reduction at last weekend's Azerbaijan GP, where the main straight's DRS zone was shortened by 100 metres.
But following a largely processional inaugural Miami GP last year, the shortened zones are likely to raise eyebrows.
On Sunday the Baku City Circuit produced a tepid race at which overtaking proved nearly impossible, and several drivers questioned why the DRS zone had been reduced when overtaking in 2023 turns out to be more difficult than the year before due to the extra downforce teams have added to their cars.
Source: Autosport