British motorists are having to use a road network of similar quality to Namibia's and worse than those in Malaysia, Chile and Taiwan, a new report suggests.
The UK has slipped from 24th to 28th in the World Economic Forum's roads quality league table.
The forum asked motorists in countries around the world to give the efficiency and extensiveness of their road networks a rating between one and seven.
The global average was 4.0, but among long-established EU members the UK's 5.3 score was superior only to Italy's 4.4.
Sarah Rice of the RAC said: "The fact the condition of our roads was rated 24th in the world was already disgraceful and to see this further deteriorate is extremely disappointing.
"Unfortunately, it will come as little surprise to drivers across the country who are having to drive on some stretches of roads as if they are on an assault course.
"While there is hope on the horizon for significant investment in our national road network, we are yet to see significant commitment to solving the problems on local roads, where a combination of successive harsh winters and cash-strapped councils facing difficult choices on spending priorities has caused a 'perfect storm'.
"In fact, theRAC has seen a phenomenal 67% increase year-on-year in the number of cars we attend due to suffering pothole damage, which proves the issue is becoming ever important and needs to be dealt with as a matter of national importance."
The United Arab Emirates took top spot in the league table with other oil-rich states like Oman, Saudi Arabia and Bahrain also rated above the UK, whose motorists put its road network on a par with the Republic of Ireland and Namibia.
France's 6.4 score earned it second place in the table, which was propped up by Moldova's score of 1.7.
New EU member Romania scored 2.1 while motorists in Hungary, Pakistan and Azerbaijan gave their road networks average scores.
Copyright Press Association 2014