Signal timing improvement practices / Peter S. Parsonson.
Parsonson, Peter S.
Signal timing improvement practices / Peter S. Parsonson. - Washington, D.C. : TRB - Synthesis of highway practice ; 172 / Transportation Resear-ch Board. .
Signal timing improvement practices / Peter S. Parsonson. - Washington, D.C. : TRB - Synthesis of highway practice ; 172 / Transportation Resear-ch Board. .