Welcome on piarc.org!

PIARC (World Road Association), founded in 1909 and comprising 125 member governments from all over the world, is the global forum for exchange of knowledge and experience on roads, road transport policies and practices. With consultative status to the Economic and Social Council of the United Nations, the Association is contributing to a stable and sustainable global development of the road and transport sector.

This site uses cookies to optimize its operation. They allow you to securely access your personal space and download our publications. You accept their use by clicking on the "Accept" button.

Your basket
  1. Home
  2. Our activities
  3. World Road Congresses
  4. World Road Congresses Proceedings
  5. Lisbon 1951
  6. National Reports

IXth World Road Congress - Lisbon 1951 - National Reports

Summary

Section 1. Road Construction and Maintenance

  • Question 1: Progress made since the congress at The Hague in 1938
    A) In the use of cement or special materials in the construction of road and runway surfacing;
    B) in the preparation, and the use on roads and runways, of plastic binders (tars, bitumens, powdered asphalt and other plastic materials).
  • Question 2: Progress made since the Congress at The Hague in 1938 in the study of road subgrades
    A) Determination of the properties of the subgrade methods of testing, apparatus.
    B) Stabilisation of soils for use in road foundations and surfacings.

Section 2. Highway Design, Traffic and Development

  • Question 3:
    A) Basic factors in road design.
    B) Studies of traffic and of the conditions which influence it, especially: Vehicles speeds; Type of traffic; Overtaking; Design of intersections.
  • Question 4: Economic justification for road works

Section 1 et 2. Joint Meeting

  • Question 5:
    A) Construction and maintenance of roads in general and of
    B) urban roads in particular with particular reference to: surfacings permitting easy repair of underground mains; pipes; tramways; smoke (exhaust gases); visibility; longitudinal gradient and restrictions on frontages in regard to future building.
  • Question 6: Construction and maintenance of roads in thinly populated or underdeveloped countries, with special reference to available resources and to the traffic to be carried - Allocation of funds to the construction and maintenance of these roads.

Section 1. Road Construction and Maintenance.

Question 1: Progress made since the congress at The Hague in 1938

A) In the use of cement or special materials in the construction of road and runway surfacing;
B) in the preparation, and the use on roads and runways, of plastic binders (tars, bitumens, powdered asphalt and other plastic materials).

Question 2: Progress made since the Congress at The Hague in 1938 in the study of road subgrades

A) Determination of the properties of the subgrade methods of testing, apparatus.
B) Stabilisation of soils for use in road foundations and surfacings.

Section 2. Highway Design, Traffic and Development.

Question 3

A) Basic factors in road design.
B) Studies of traffic and of the conditions which influence it, especially: Vehicles speeds; Type of traffic; Overtaking; Design of intersections.

Question 4: Economic justification for road works.

Section 1 et 2. Joint Meeting.

Question 5

A) Construction and maintenance of roads in general and of
B) urban roads in particular with particular reference to: surfacings permitting easy repair of underground mains; pipes; tramways; smoke (exhaust gases); visibility; longitudinal gradient and restrictions on frontages in regard to future building.

Question 6

Construction and maintenance of roads in thinly populated or underdeveloped countries, with special reference to available resources and to the traffic to be carried - Allocation of funds to the construction and maintenance of these roads.