The first pieces of steel have gone up to build a massive canopy over the curbside and roadway next to the domestic terminal at Hartsfield-Jackson International Airport.

Support columns for the canopy were erected overnight Sunday at the Terminal North roadway.

The construction is causing traffic congestion for travelers trying to navigate around the world's busiest airport. Travelers should aim to arrive at the airport half an hour earlier than normal, or 2.5 hours before domestic flight departure times, according to airport officials.

The price tag for the canopies and other terminal improvements: $265 million, which is  $102.5 million more than originally expected.

— Stay up to date on the latest news on Atlanta airline travel by following  Atlanta Airport News Now  on Facebook.

MORE:

More congestion coming to Hartsfield-Jackson curbside amid construction

Airport aims to soften curbside look with canopies

Work starts on Atlanta airport’s curbside canopies

Cost soars for Hartsfield-Jackson curbside canopies project Hartsfield-Jackson has erected the first pieces of steel at Terminal North for its massive canopy over the curbside and road next to the terminal.