In second place was congestion at 81% reflecting the increasing number of vehicles on our roads as the recession ends.
These worrying figures come from the second Safety Culture Survey commissioned by road safety charity IAM RoadSmart.
Of the 2,000 UK drivers surveyed, nearly three quarters believed aggressive driving (72%) had worsened over the last three years, with more than 60% reporting the same for drug-driving.
Sarah Sillars, IAM RoadSmart chief executive officer, said: “The worries and concerns of Britain’s 32 million drivers should be listened to. Whilst we can all take more responsibility for our actions it is clear that distraction and congestion are the two biggest bug bears for drivers today.
“New road building and smart motorways will help with congestion but our survey has shown that UK motorists have real concerns about the way mobile phone technology could be a threat to their safety. More than 90% say checking social media, texting and talking on mobile phones whilst driving scares them – these are figures that cannot be ignored.”