"There are four key phases of a drive," according to eminent quantum physicist, Dr Mark Hadley - our lead researcher. Bends, acceleration, cruising and braking, to be precise.
"A great driving road strikes just the right balance between the phases so you get the exhilaration of speed and acceleration, whilst corners test your driving capabilities and long stretches allow you to enjoy the scenery."
What does the Avis Driving Ratio mean?
In a nutshell, we've calculated the optimum balance between all these key components - which in turn has allowed us to scientifically establish the World's Best Driving Road.
This led Dr Mark Hadley to calculate that the ideal Avis Driving Ratio is 10:1 - 10 seconds on a straight compared to 1 second spent on a bend.
What is the World's Best Driving Road?
You'll see in our Top 25 Roads section that 1st place was secured by the N-222 from Peso da Régua to Pinhão, in Portugal. This route follows the River Douro, offering amazing views of the terraced hillsides.
Notably, the N-222 has an ADR of 11:1 - meaning it is the closest match globally to the ideal Avis Driving Ratio of 10:1, and therefore offers the world's best driving experience.
To explain further, Dr Mark Hadley added: "The time spent on the straight allows for the optimum time to appreciate the surrounding scenery before moving into the next bend, whilst still giving the driver the thrill and excitement you get from a challenging drive".
Explored: The theory behind the ADR formula
Would you like to really understand the intricacies of the World's Best Driving Road? Dr. Mark Hadley breaks down the science behind the Avis Driving Ratio, and all the variables that came together in his research to create this formula. Click here to find out more.