Sinn Féin representative Darren O'Rourke TD vocalised concerns over how the transport plans will reduce the sector's emissions by 42% - 50% as per the Climate Action Plan.
Calling into question the scale and ambition of change, the Meath East TD said: "The Greater Dublin Area Transport Strategy, published last week, aims to have just 11.5% of journeys by bike by 2042.
"Compare this with Copenhagen, where today 49% of journeys are made by bicycle.
"School bus transport is significantly oversubscribed each year, but the current target outlined in Bus Éireann's Sustainability Strategy, would only see a 20% increase in places by 2030 - equivalent to just 1,000 extra places each year.
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"This is hugely under ambitious and fails to recognise how many daily car journeys can be removed by radically expanding this scheme.
"Another example is the Safe Routes to School Programme. This programme aims to create safer walking and cycling routes within communities to increase active travel.
"It's hugely oversubscribed, with 931 schools expressing interest, but just 170 schools awarded funding this year.
"Schools are crying out for investment and support to increase active travel, but the government are failing to meet the demand."
He continued: "Similarly, public transport fares are a huge barrier for many people, and we aren't seeing the ambition needed to reduce costs for people to encourage them to take the bus, train or tram.
"Likewise, funding for the NTA's Connecting Ireland plan is backloaded, with just 10% of funding allocated in Year 1 and no guarantee of future funding.
"These are just some examples of low hanging fruit that can be immediately tackled to kick start a significant reduction in our emissions.
"There's a clear contradiction between the climate rhetoric and action on the ground when it comes to tackling transport emissions.
"In my opinion the current scale, ambition and pace of change won't deliver the transformational change we need to meet our climate targets."
