More than a third of passengers say they struggle to sleep on a car ride, according to new research conducted by Citroen UK and leading sleep behaviour and environment expert, James Wilson of 2,000 UK motorists.
The study found 37% of passengers said they struggled to fall asleep in a car, while 14% said they never sleep on the move at all. The aspects of the vehicle and the driving environment were also studied with more than half of all respondents (55%) saying comfortable seats make it easier to fall asleep, while a smooth ride and good legroom were highlighted by 49% and 26% of respondents respectively. Neck and head support, as well as an optimum in-car temperature, were highlighted by 24% of all surveyed.
Unsurprisingly, motorways and dual carriageways were found to be the most tranquil setting for passengers, with 67% of respondents falling asleep on those types of roads.
While the length of a nap depends very much on the journey, Wilson advises that passengers should sleep for no longer than 30 minutes at a time on a car trip in order to feel the full benefit and to be well rested. On average, passengers needed just over 1 hour and 15 minutes on the road before they nodded off.
While some drivers may get disgruntled when their passengers slept, research showed that two thirds (66%) of drivers aren't really that bothered if their travel companions fall asleep. For drivers who prefer passengers to stay awake, the main causes of annoyance were being left without anyone to talk to and the distraction of snoring.
Using the findings from the survey, as well as Wilson's own research, Citroen has come up with a formula for the Optimum In-Car Sleep (OICS), to help deliver a better in-car passenger powernap experience.
Comfort (C) is a function of Seating Position (SP), Time (T), internal Ambiance (A), Legroom (L) and Suspension (S), while external distractions such as road noise and bumps are characterised by the function (R).
James Wilson, The Sleep Geek, said that the research came back with some interesting insights especially around how challenging some people find napping on the go.
"We can often struggle to find time for a power nap, so the car can be an ideal place. Being able to catch a 30-minute power nap during the day, when it’s possible, is really beneficial and can certainly help people to feel reinvigorated.”