Until that time, there was a lack of information on urban travel that could be used for the planning of highway facilities. In fact, no comprehensive survey methods had been developed that could provide the required information.

Until that time, there was a lack of information on urban travel that could be used for the planning of highway facilities.
③それまでは、道路(設備)計画に使われる都市交通情報(データ)が乏しかった。

In fact, no comprehensive survey methods had been developed that could provide the required information.
④実際に、必要な情報を提供できる包括的な調査方法が確立していなかった。

Because of the complex nature of urban street systems and the shifting of travel from route to route, traffic volumes were not a satisfactory guide to needed improvements. A study of the origins and destinations of trips and the basic factors affecting travel was needed (Holmes and Lynch, 1957).

Because of the complex nature of urban street systems and the shifting of travel from route to route, traffic volumes were not a satisfactory guide to needed improvements.
⑤都市道路網(体系)の複雑さと、路線から路線への転換交通があったため、交通問題改善において、(道路)交通量だけの議論では不十分であった。

A study of the origins and destinations of trips and the basic factors affecting travel was needed (Holmes and Lynch, 1957).
⑥分布交通(OD)と交通発生に影響する諸要因の研究が求められた。(Holmes and Lynch, 1957)