Regulation 5033/1986 of ÁTB decreed also on the DBR Metro line, specifically investment proposal etc., namely that it should be submitted to ÁTB in 1987. In the period 1985 to 1986, financial and scheduling estimates changed, construction of the North-South Metro line was postponed. In 1982, ÁTB made a new decision, according to which any investment proposals related to the new line (including general projections referring to Metro network) shall be submitted in 1985. In 1981, an amended technical-economic documentation was prepared, in which the first section to be implemented was Bocskai út - Baross tér, due to an amendment in urban development concepts in the meantime. Submission of the investment proposal to ÁTB was postponed, so the starting year was assigned to be 1981. In 1978, out of the investments to be launched the DBR line project was suspended (according to a relevant decision of the Council of Ministries). The Chairmain of the Capital's Council was instructed thereby to submit his investment proposal to ÁTB in the first semester of 1978. In 1977, ÁTB approved the target of development under the number 5005/1977 (Section I-II: Budafok - Baross tér - Baross tér - Bosnyák tér). In 1976, Regulation 3034/1976 of the Council of Ministries assigned 1978 as the starting year of line construction, and approved HUF 1.1 billion in the 5th five-years plan at the same time, submission of the target of development for 1976 was ordained as well. In 1974, an OMFB Study finalised the alignment and discussed the technology of construction.
![budapest metro 4 map budapest metro 4 map](https://i.pinimg.com/originals/35/f8/7b/35f87b631fd35898de864870b4a7099e.jpg)
![budapest metro 4 map budapest metro 4 map](https://t-ec.bstatic.com/images/hotel/max1024x768/146/146506992.jpg)
In 1972, the Plan of Development for Budapest and surroundings assigned the line Bél-Buda to Rákospalota to be the fourth Metro line in Budapest.