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https://nap.nationalacademies.org/catalog/27432/critical-issues-in-transportation-for-2024-and-beyond

Application of the four-step principle for the development of Hameenlinna artery

Neliporrasperiaatteen soveltaminen Hameenlinnanvaylan liikennekaytavan kehittamisessa

Finnish Road Administration has deployed a four-step analysis of implementation, where the palette of available measures includes transport demand and mode split management, enhancing the efficient utilisation of network and upgrading the network in small steps in addition to the usual infrastructure investments. The objective is to enhance the level of service by combining different types of measures. The City of Vantaa has been planning a new large district called Marja-Vantaa. The current detached housing area would gain additional 23 000 inhabitants, 25 000 work places and considerable amount of large specialty and grocery shopping floorspace. Densely planned land-use has been planned around the new stations of a new ring rail line. However, the trunk connection for car traffic of the area, the Hameenlinna artery, is already critically over-saturated. The growth rate of the demand is above average and the capacity will be exceeded in a few years. The demand along the Hameenlinna artery can be affected through land-use controls and careful timing of the retail floorspace construction. The construction of the ring rail line and its adjoining parking facilities has a great impact on the high modal share of pubic transport. Without them, the effect on saturation of the Hameenlinna artery equals 7 000 new inhabitants and 6 000 work places. The effect of the parallel streets increasing the functionality of the Hameenlinna artery is big. A new street on the west side and the lengthening of Tikkurinlantie decrease the congestion in Hameenlinna artery by al-most 20 %. To maintain the adequate level of service in the Hameenlinna artery, the means by demand management are limited. Variable signs and speed limits are needed primarily for safety and alleviation of externalities. Considering the scale and features of new land-use in addition to the extensive characteristics of the transport system, the planned transport corridor requires a more comprehensive approach than usual. The immediate problems hampering the functioning of the traffic were dealt by small, affordable and efficient measures that could postpone major investments. Maintaining the capacity only with light measures is not practical, because a significant part of the main investments is most efficiently carried out at the same time as the construction of the ring rail line due to technical reasons or due to the facilitation of park and ride. The focus was extended during the study from road capacity issues towards the functionality of the whole transport system. The four-step assessment was now carried out in the general planning phase of the Hameenlinna artery. A detailed general plan for the area has just been completed and construction planning of the ring rail line is starting. A more natural phase for the first step of the four-step principle would be the land-use general plan or the transport plan of the detailed general plan or alternatively the pre-studies of the transport arteries i.e. the local transport systems plan. During this earlier phase one would have a more comprehensive palette of measures available for demand management, mode split management and traffic management. This report may be found at http://alk.tiehallinto.fi/julkaisut/pdf/3201041-vneliporr_periaatt_sovel.pdf

Language

  • Finnish

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Filing Info

  • Accession Number: 01094815
  • Record Type: Publication
  • Source Agency: TRL
  • ISBN: 978-951-803-847-7
  • Files: ITRD
  • Created Date: Apr 25 2008 7:58AM