Kammala jumla mai zuwa: An fara shirin gina babbar hanya tsakanin manyan biranen kasar guda biyu a shekarar 1954 a matsayin wani bangare na shirin Pyidawtha na gwamnatin U Nu. A shekara ta 1959, Amurka ta ba da tallafin kuɗi da fasaha don "binciken injiniya na farko" na babbar hanyar. Taimakon kudi ya kai dala 750,000. Lokacin da aka kammala binciken a shekarar 1960, gwamnatin Burma ta ki amincewa da kudin a matsayin mai tsada sosai. A shekara ta 1961, gwamnatin Amurka ta amince ta ba da kuɗi don yin wani binciken da ya fi dacewa. An fara aikin binciken a farkon 1962 amma an kammala shi ne kawai a watan Disamba bayan an jinkirta shi ta hanyar
Juyin mulkin soja na 1962 da Majalisar Juyin Juya Halin Tarayya a watan Maris na 1962. Gwamnatin soja da farko ta amince da sabon shawarar, kuma ta ba da izinin tsara shimfidar hanyar mota ta Yangon <unk> Pegu a watan Maris na 1963. An shirya shirye-shiryen zane a watan Disamba na 1963 amma ba a aiwatar da su ba. Sun zama wadanda ke fama da mummunan dangantaka tsakanin Amurka da gwamnatocin Burma.