2020 marks the 30th anniversary of the Brazilian Tunnel Committee. To celebrate, the CBT board invited the entire tunnelling community to Tunnel Day 2020. The event, which took place annually on December 4 - St. Barbara's Day, patron saint of tunnellers and miners - brought together experts to discuss relevant issues of tunnel engineering throughout the day.

This year, the meeting held on line  due to the Covid-19 pandemic. The CBT board of directors  produced all the preparations directly from the Engineering Institute of São Paulo, from where the event has been broadcasted.

"The 30 years of CBT and  tunnels, and expectations for the future" was the theme of the edition. There were conferences with several engineers throughout the day. The Tunnel Day was broadcasted live on CBT channel on YouTube.