The courses were revealed during this year's event, which is currently ongoing here in Bergen.

A 265 kilometre course for the men's elite road race headlines the list of courses in the Austrian city, with the event poised to feature 5,000 metres of climbing.

Racing will begin with the women's and men's team time trials, which will be conducted over distances of 53.8km and 62.1km respectively.

Both races will start in Ötztal and draw to a finish in Innsbruck, with the only change seeing the men pass villages of Axams and Götzens, which will boast gradients of up to 10 per cent.

Individual time trials for junior men and women, men's under-23 and elite women will start 20km east of Innsbruck in the Hall-Wattens region.

Juniors will ride a distance of 20.2km, with 192 vertical metres of climbing as they head towards the finish in Innsbruck.

The under-23 men and the elite women's riders will tackle a route which will tackle 28.5km and 262 vertical metres.

The men's elite time trial will begin in Rattenberg, the smallest town in Austria, before heading up a 4.4km climb between the villages of Fritzens and Gnadenwald.

This carries a maximum gradient of 14 per cent.

Racing will conclude in Innsbruck, with riders covering 54.2km.

Rattenberg will also host the start of the junior women’s road race, with the riders set to cover a 24km lap, known as the Olympic circuit.

The remaining road races will start in Kufstein and will conclude in Innsbruck, with the men’s junior and under-23 events set to be held over courses of 138.4km and 186.2km.

A course of 162.3km has been decided for the women’s elite road race, while the men will compete over 265km.

The men will tackle the circuit seven times before heading through the city and up to the Hungerburg settlement, located in the north of the regional capital.

It is expected the final climb of the race will prove decisive, with sections rising to up to a 25 per cent gradient.

The race will conclude in the centre of Innsbruck between a theatre and the Imperial Palace.

"The challenging climbs and technical sections offered by Innsbruck-Tirol, combined with the traditional UCI Road World Championships distance, promise to be a huge challenge for the riders," said Georg Spazier, Innsbruck 2018's head.

"Only the most complete ones will have a chance on such a demanding terrain."

Racing will take place from September 23 to 30.

Road races are set to take place this weekend in Norway, with Denmark’s Amalie Dideriksen the defending women's road race champion.

Slovakia's Peter Sagan will eye a third straight men’s title in Bergen.