documentclass[a4paper, 11pt]{report}
usepackage[utf8]{inputenc}
usepackage[left=22.5mm,right=22.5mm,top=30mm,bottom=30mm]{geometry}
usepackage{enumitem}
setlist[itemize]{leftmargin=*}

usepackage{tabularx}
usepackage{booktabs}
usepackage{ragged2e}
newcolumntype{L}{>{raggedrightarraybackslash}X}


begin{document}

begin{table}
centering
caption{Key economic benefits of the project.}
begin{tabularx}{textwidth}{>{raggedrightarraybackslash}p{5cm}L>{raggedrightarraybackslash}p{5cm}}
    toprule
    Traffic Benefits & Wider Economic Benefits & Contribution to GDP \
    midrule
    $1,580 million & $800 million to $1,300 million & $600 million to $1,100 million \
    midrule
    vspace{-5mm}begin{itemize}
        setlengthitemsep{0em}
        item Travel time savings
        item Congestion cost savings
        item Reduced fuel consumption
        item Vehicle operating cost savings
        item Other
    end{itemize} &
    vspace{-5mm}begin{itemize}
        setlengthitemsep{0em}
        item Local job generation (estimated to be around 18,500 jobs)
        item Improved productivity from reduced travel time
        item Increased accessibility providing opportunities for greater economic growth
    end{itemize} &
    vspace{-5mm}begin{itemize}
        item Increased revenue from taxes – from increased employment productivity and growth
    end{itemize} \
    bottomrule
end{tabularx}
end{table}

end{document}