The firm, which incorporated Polk into its business last year, based its findings on a snapshot of vehicles in operation taken 1st January 2014

The total number of light vehicles in operation (VIO) in the US reached a record level of more than 252,700,000 – an increase of more than 3.7 million (1.5%) since last year, said the IHS Automotive analysis from July 2013. In addition, new vehicle registrations outpaced scrappage by more than 24% for the first time in a decade, according to the analysis.

The average age is in line with the trend shift first seen in 2013, in which the combined fleet of cars and light trucks on the road is older than ever. New analysis, however, indicates the average age of light trucks has increased in the past year to the same age as passenger cars, both at 11.4 years. This milestone marks the first time this has happened since 1995, when the data was first reported.

‘In our history of tracking, we have seen a gradual increase in the average age of vehicles on the road,’ said Mark Seng, director, aftermarket solutions and global aftermarket practice leader at IHS Automotive. ‘This year, we’re seeing somewhat of a plateau in the market, and expect it to remain over the next few years, without a major change in either direction. We attribute this to a number of factors, including the economy and the increasing quality of today’s automobiles.’

Looking ahead, IHS forecasts that average age of vehicles is likely to remain at 11.4 years through 2015, then rise to 11.5 years by 2017 and 11.7 years by 2019. This rate of growth is slowing as compared to the last five years due to the substantial increase in new vehicle sales.

Based on the growth of new vehicle registrations in the past few years as the US auto industry has rebounded, IHS Automotive forecasts that the volume of vehicles 0-5 years old will increase by 32% over the next five years while vehicles in the 6-11 year old category will decline by 21%. Because of improved quality and consumers holding their cars and light trucks longer, vehicles 12-plus years old continue to grow and will increase by 15% by 2019.