According to Minister Kubrakov, the upgrades will “improve logistics and increase export capacity” as Ukraine seeks to boost economic activity amid Russia’s invasion.
From Euromaiden Press BY IRYNA VOICHUK:

The United States will pledge nearly $700 million to help upgrade Ukraine’s logistic and transport infrastructure, Ukraine’s Minister of Infrastructure Oleksandr Kubrakov announced on 17 October.
The funds will go towards modernizing and increasing capacity at Ukraine’s ports, railways, and border crossings. According to Minister Kubrakov, the upgrades will “improve logistics and increase export capacity” as Ukraine seeks to boost economic activity amid Russia’s invasion.