A new report on transport says the number of Dublin Bikes journeys has more than doubled since 2013.

The 'Transport Trends' document says that is a rise of 74.5% in the number of cyclists entering the city in the morning, compared to 2010.

It finds that - on a par with other EU countries - the use of a private car is "clearly" the dominant mode of travel in Ireland.

Data on commuting trips indicates that private car use increased from 58% in 1981 to 70% in 2011.

It says the most common primary journey purpose is work and education trips, which have increased from a 27.8% share in 2012 to 29.5% in 2014.

The second largest were trips with shopping as their main purpose, with 24% of the total in 2014.

Public transport has also increased slightly from 5.2% in 2012 to 5.8% in 2014 - while walking and cycling has grown to 16.4%.

It says a total extra 7.7 million passenger journeys were taken on key public transport services, while there was 15% growth in the number of passengers using Dublin Airport - to an all-time high of 25 million.

Provisional data for 2015 indicates that Luas passenger numbers increased by 6.1%, or two million passengers, in comparison to 2014.

The report also points towards challenges, including the dominance of private car use and the increasing level of emissions from the transport sector.

The acting Transport Minister Paschal Donohoe says: "An overarching theme emerging from Transport Trends 2016 is that the context within which transport policy operates has changed significantly in the last two years".

"Having experienced a number of years of stagnation and decline, substantial growth is now being recorded across the transport sector".

"This is on the back of the growth we are seeing within the economy generally, which is necessitating increased movement of the population as more people get back to work".

"The transport system must now support that rapidly growing economy", he adds.