Three-quarters of Irish workers are concerned about contracting Covid-19 if they use public transport to get to work.
Trinity researchers also found a major shift in attitude towards working from home in the space of a year.
In 2019, just 25pc of 500 surveyed said they would strongly favour working from home up to two days a week - now that figure has jumped to 80pc.
Professor Brian Caulfield, of Trinity College's School of Engineering, leads a team of researchers who first surveyed participants in 2019 and again in May 2020.
The results indicate how commuting and work practices are likely to change once the Government lifts travel and work restrictions.
Trinity researchers found, both in 2019 and 2020, the main motivating factors cited for working from home were a desire to save time and money.
The 2019 results found, on average, 0.15 tonnes of carbon could be saved every year if employees worked from home just one day a week.
In terms of commuting to work, the 2020 survey asked workers how their mode of travel would change once virus restrictions are lifted.
A quarter said that they would travel to work by public transport less often, while 32pc said that they would walk to work more often.
However, 75pc feared of contracting Covid-19 while travelling by public transport. The vast majority felt driving alone, walking and cycling would result in a much lower risk of contracting Covid-19 compared to using public transport.
"The current results from the study show that between the two survey periods working from home has become much more acceptable and that in a post-Covid-19 world this might become the norm," Prof Caulfield said.
"The findings related to public transport echo those that have been reported internationally and demonstrate the concerns people have about using public transport.
"One of the positive findings is the potential shift towards working from home, which is shown to provide both personal benefits related to travel time saved, but also emissions reductions contributing to our climate change targets."
New research by the ESRI has found people expect the lifting of social distancing restrictions to be slow and gradual, with most indoor social activities not possible until at least September.
The study involved a representative sample of adults in Ireland and found that most believe the lifting of restrictions should prioritise necessities ahead of leisure activities.
They expected non-essential shops and workplaces to reopen gradually between June and August.
Most expected cafés and restaurants to reopen in July or August, but schools and indoor leisure venues to remain closed until at least September, including sports facilities and gyms, arts and cultural centres, and pubs and clubs.
A return to "normality" is not expected until at least 2021.
Dr Cameron Belton, of the ESRI's Behavioural Research Unit, said the study revealed "further evidence of Ireland's ability to pull together at a time of crisis".
"The large majority of people have absorbed the need to proceed slowly and carefully. They are willing to make sacrifices now for a better outcome in the long run," he said.
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