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Back北陸新幹線延伸の費用対効果試算に疑問、小浜・京都ルート採用の背景に手法の変更
北陸新幹線延伸の費用対効果試算に疑問、小浜・京都ルート採用の背景に手法の変更
Developing
朝日新聞3 hours agoPolitics2 min readJapanView translation

北陸新幹線延伸の費用対効果試算に疑問、小浜・京都ルート採用の背景に手法の変更

北陸新幹線小浜・京都ルート米原ルート

Quick Look

国土交通省が北陸新幹線延伸の費用対効果（B/C）を試算し、自民党が推す小浜・京都ルートを後押しした。しかし専門家が疑問視する手法が使われており、基準となる時期をルートごとに変更していたことが明らかになった。維新の会は米原ルートを推していたが、最終的に小浜・京都ルートが採用された。

AI-generated summary

Why It Matters

北陸新幹線は2024年に金沢―敦賀間が開業。残りの敦賀―新大阪間のルートについて、自民党は小浜・京都ルートを、日本維新の会は米原ルートを推してきた。10年前の試算では小浜・京都ルートは不利だったが、今回の試算では逆転した。

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北陸新幹線延伸をめぐり国土交通省が試算した費用対効果（B/C）は、自民党が推してきた「小浜・京都ルート」への強い追い風となった。同案はその後、日本維新の会が推していた別案を退け「採用」が決まった。

ただその計算では、小浜・京都とそれ以外で基準となる時期を変えるという、専門家が疑問視する手法がとられていた。国交省は明確な説明を公にしておらず、国家プロジェクトの信頼性に影を落としている。

覆された予想

北陸新幹線は2024年に、金沢―敦賀（福井）間が開業。敦賀―新大阪間のルートについての議論が続いている。自民は長く、福井県小浜市と京都市などを経由する小浜・京都ルートを推してきたが、昨年与党入りした維新は、同案に反対。滋賀県米原市を通る米原ルートを推し、綱引きが続いていた。

10年前に国交省が行った試算では、小浜・京都ルートは米原ルートに比べ建設費用が高く、B/Cが低かった。

だが国交省が6月に示したB…

What to Watch

AI outlook — possibilities, not facts

  • 国土交通省が試算手法の詳細を説明する機会が設けられる

    Possible · Within weeks

  • 小浜・京都ルートの建設費用が試算を上回る可能性が指摘される

    Possible · Within months

Open Questions

  • 国土交通省はなぜ基準となる時期をルートごとに変更したのか
  • 試算の詳細な内訳と前提条件は公開されているか
  • 専門家の批判に国土交通省はどのように応えるつもりか

Related Topics

北陸新幹線
Organizations国土交通省自民党日本維新の会
Places日本福井県京都府滋賀県
Topics小浜・京都ルート米原ルート費用対効果B/C国土交通省自民党
This article was originally published by 朝日新聞.

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