1- Design and execution of metro lines with the 41,615 meters total length as underground lines, and 76,960 meters as open area lines.
2- 239,100 meters total length for track works.

 TWDE has successfully recorded the execution of ordinary and special concrete structures in difficult and different situations and volumes
 in its experience background as follows:
1- normal concrete:
- 2,301,287 m³ Structural concrete in 200 to 400 cm class
- 256,854 m³ Lean concrete in 200 to 400 cm class
2- 60,000 m³ Plastic concrete
3- 200,000 m³ Soil cement (RCC)
Also the average records for 57,000 cum structural concrete have been recorded in the execution background of the company.
In accordance with the completed projects, the company has the experience of executing mass volume of 272,621 Tons reinforcement in different methods, such as dense and heavy reinforcement and in complicated condition, in its background.

This company has recorded the experience of executing of more than 47000 meters different tunnels in the its background with the bellow mentioned specifications: 1- 27000 meters with 9.15 m2 Cross section 2- 20060meters with 6.8 to 69 m2 Cross section It is ineluctable to state that 75% of the tunnels executions has been done by means of TBM excavator.

Taking advantage of different machineries and equipment, this company has been successfully executed more than 1,775 meters length asphaltic cover road with the 4 to 22 meters width. Also the sandy cover roads with 12,500 meters total length, has been recorded in the company’s experience background. regarding the skilled and experienced human recourses, and also by using advanced machineries, the company has successfully constructed 51 No. bridges from 10 to 45 meters width.