Drivers are being advised to plan ahead and allow extra time if they are travelling to and around Farnborough in Hampshire this weekend (Saturday 16 and Sunday 17 July) during the public days of the Farnborough International Airshow 2016.
Over 100,000 people are expected to head for the public show over the weekend with a further 100,000 trade visitors expected throughout the preceding week.
Visitors are being advised to travel to the show by public transport but it is likely that there will an increased number of vehicles on local roads and the M3 around junctions 4 and 4a.
Highways England provides live traffic information on our website and at @HighwaysSEAST on Twitter, local and national radio travel bulletins, electronic road signs and mobile apps.
Members of the public should contact the Highways England customer contact centre on 0300 123 5000.
Journalists should contact the Highways England press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.