\begingroup
\tiny
\setlength{\tabcolsep}{2.4pt}
\begin{longtable}{>{\raggedright\arraybackslash}p{0.06\textwidth}>{\raggedright\arraybackslash}p{0.20\textwidth}>{\raggedright\arraybackslash}p{0.09\textwidth}>{\raggedright\arraybackslash}p{0.09\textwidth}rrrr}
\caption{Route-level public-data screening metrics}
\label{tab:routemetrics}\\
\toprule
ID & Short route label & Origin district & \shortstack{Grade/\\coordinate} & \shortstack{Sensitive/\\km$^2$} & \shortstack{Population\\(000s)} & Ratio & \shortstack{Stability\\A/E} \\
\midrule
\endfirsthead
\multicolumn{8}{c}{\tablename\ \thetable\ -- continued} \\
\toprule
ID & Short route label & Origin district & \shortstack{Grade/\\coordinate} & \shortstack{Sensitive/\\km$^2$} & \shortstack{Population\\(000s)} & Ratio & \shortstack{Stability\\A/E} \\
\midrule
\endhead
001 & World Window & Nanshan & A/manual & 0.00 & 13.0 & 0.034 & 0.00/0.00 \\
002 & Tsigs & Nanshan & A/manual & 2.36 & 25.4 & 0.800 & 0.00/0.57 \\
003 & Talent Park & Nanshan & A/usable & 3.00 & 4.0 & 0.125 & 0.00/0.00 \\
004 & Eastern Oct & Yantian & A/manual & 1.62 & 17.1 & 0.800 & 0.00/0.85 \\
005 & Central Park & Futian & A/usable & 1.39 & 22.1 & 0.211 & 0.00/0.00 \\
006 & Longhua North Station One & Longhua & A/manual & 4.74 & 18.7 & 0.216 & 0.15/0.00 \\
007 & Longhua Tianjun & Longhua & B/usable & 6.42 & 13.0 & 0.213 & 0.99/0.00 \\
008 & Longhua Rongchuang Zhihui & Longhua & B/usable & 6.70 & 43.5 & 0.783 & 1.00/0.83 \\
009 & Longhua Hbc & Longhua & B/usable & 4.91 & 15.5 & 0.222 & 0.58/0.00 \\
010 & Happy Valley & Nanshan & B/manual & 0.59 & 13.0 & 0.077 & 0.00/0.00 \\
011 & Medical Minzhi To Hospital & Longhua & A/manual & 4.67 & 89.4 & 1.083 & 0.44/0.82 \\
012 & Medical Longhua Street To Hospital & Longhua & A/usable & 5.21 & 104.4 & 0.529 & 0.87/0.03 \\
013 & Baoneng To Siat & Nanshan & B/manual & 5.29 & 12.1 & 0.435 & 0.39/0.21 \\
014 & Baoneng To Tsigs Intl & Nanshan & B/manual & 3.39 & 35.5 & 0.464 & 0.01/0.27 \\
015 & Baoneng To Tsigs Heyuan & Nanshan & B/manual & 3.85 & 33.4 & 0.500 & 0.01/0.33 \\
016 & Baoneng To Pkusz & Nanshan & B/manual & 3.60 & 28.7 & 0.423 & 0.00/0.23 \\
017 & Baoneng To Zhiyuan Chongwen & Nanshan & B/manual & 5.42 & 10.3 & 0.350 & 0.22/0.24 \\
018 & Baoneng To Zhiyuan Phase2 & Nanshan & B/manual & 2.29 & 13.5 & 0.240 & 0.01/0.00 \\
019 & Bay North Harbor & Nanshan & A/usable & 1.58 & 18.8 & 0.106 & 0.00/0.00 \\
020 & Luohu Cuihu & Luohu & A/usable & 4.17 & 82.2 & 0.692 & 0.34/0.91 \\
021 & Futian Port & Futian & B/usable & 6.71 & 207.6 & 0.271 & 1.00/0.00 \\
022 & Gold Lilang To Shuibei & Longgang & A/manual & 3.24 & 331.2 & 0.750 & 0.00/0.70 \\
\bottomrule
\multicolumn{8}{p{0.96\textwidth}}{\footnotesize Notes: ``manual'' means at least one endpoint requires manual coordinate validation. Population is WorldPop 2020 within the 500 m total buffer. Ratio is $(H+1)/(B+1)$. Stability A/E reports fixed-seed top-six selection frequency for absolute exposure and service-to-exposure efficiency.} \\
\end{longtable}
\endgroup