The 2,377-km railway project remains without a confirmed start date.
GulfCap Real Estate is using tunnel formwork to expedite projects.
The first 100 kilometres of pipes have arrived in Dar es Salaam.
Phase one of the project is set to be complete by the end of 2024.
The 84 km road was scheduled for completion in December 2022.
The project stalled due to a court challenge by neighbouring residents.
Kenya Railways claims to be the owner of the disputed property.
China Jiangxi is demanding Sh846.5m before resuming excavation works.
The 1000 MW wind farm is expected to be completed by 2028.
The project aims to meet the Confederation of Africa requirements.