The U.S. surface infrastructure sector is on a growth track for the rest of the year, despite uncertainty around President Donald Trump’s $1 trillion infrastructure plan, according to Logistics Management, citing a mid-year report from Fitch Ratings.

The financial research company said airports and ports should continue to experience strong activity through the end of 2017, with increased traffic driving related construction spending on upgrades and expansions. Toll roads will see a more modest boost in revenue due to toll increases and will continue to face resistance from anti-toll groups.

Despite enthusiasm for public-private partnerships (P3s) in some quarters, state and local governments remain hesitant to explore the structure for infrastructure projects due to the lack of funding sources and misconceptions about how P3s work. Most public agencies will continue to finance such projects through traditional lending mechanisms.