Beginning in the early 1950s, new ideas and techniques were being rapidly generated for application in urban transportation planning. In 1950, the Highway Research Board published Route Selection and Traffic Assignment (Campbell, 1950), which was a compendium of correspondence summarizing practices in identifying traffic desire lines and linking origin-destination pairs.

Beginning in the early 1950s, new ideas and techniques were being rapidly generated for application in urban transportation planning.
①1950年代初期から、都市交通計画への応用を目的とした(に用いるための)新しい考え（アイディア）と技術が、迅速に開発された。

In 1950, the Highway Research Board published Route Selection and Traffic Assignment (Campbell, 1950), which was a compendium of correspondence summarizing practices in identifying traffic desire lines and linking origin-destination pairs.
②1950年、道路調査委員会(HRB)は、交通希望線の特定や、その分布(OD)交通のペアを繋ぐ実務を解説した（まとめた）、「経路選択と交通配分」を発表した。(Campbell, 1950)
※交通希望線：地域間(OD)の交通量の大小を線の太さで表し、地域間を直線で引いた線。

By the mid- 1950s, Thomas Fratar at the Cleveland Transportation Study developed a computer method for distributing future origin-destination travel data using growth factors. In 1956, the Eno Foundation for Highway Traffic Control published Highway Traffic Estimation (Schmidt and Campbell, 1956), which documented the state of the art and highlighted the Fratar technique.

By the mid- 1950s, Thomas Fratar at the Cleveland Transportation Study developed a computer method for distributing future origin-destination travel data using growth factors.
③1950年代の中頃に、トーマスフレイター(Thomas Fratar)は、クリーブランド交通調査で、成長因子(係数)を用いた将来の分布交通を配分するための計算技術を開発した。

In 1956, the Eno Foundation for Highway Traffic Control published Highway Traffic Estimation (Schmidt and Campbell, 1956), which documented the state of the art and highlighted the Fratar technique.
④1956年、イーノ道路交通管制財団が発表した「道路交通量予測（交通需要予測）」は、最先端技術をまとめたもので、フレーター法を強調していた。(Schmidt and Campbell, 1956)