Temperatures are heating up, which means trains on the Shepparton and Seymour lines will be slowing down.
A full extreme heat timetable will be in place on the Seymour and Shepparton train lines on January 11 and 12, with temperatures expected to be around 37℃ to 38℃.
Extreme heat speed restrictions are enforced when temperatures exceed 36℃ to reduce the likelihood of train and track faults.
Journey times may be extended by a few minutes with trains only able to travel at 90km/h.
A partial extreme heat timetable will also be in place on the Ararat, Bendigo, Echuca and Swan Hill lines.
Passengers are encouraged to check the V/Line website before travelling to see if services are affected and to allow extra time when travelling.
A copy of the extreme heat timetable was available on the V/Line website or passengers could ask for a copy from their nearest staffed station.
There will be drinking water on board trains and passengers are also encouraged to travel with bottled water and wear cool clothing.
High temperatures are also forecast on Friday and across the weekend.
Advice about extreme heat timetables for those days will be confirmed closer to the date.
Real-time traffic conditions are available at traffic.vicroads.vic.gov.au or via the VicTraffic mobile app.