Road Safety Design

The consultant will consider areas at risk of accidents such as intersections, route with narrow horizontal curves, route with long, steep slope, etc. to be safer and meet the standard. The detailed design will be carried out and report the design results in the next progress report. The safety condition concerns are as follows;

Upgrading the road both Horizontal and Vertical Geometry

• The consultant considers adjusting the current access road. In the beginning, the consultant will re-align the existing route to be in line with the current access road at 2 locations, namely at Dewadah Hill (STA. Km. 27 + 250 to STA. Km. 28 + 250) and the Saddles Hill (STA. Km. 49 + 700 to STA. Km. 50 + 850)
• The consultant considers adjusting vertical slopes with more than 10% (except the Elephant Cry Hill) and adjust the vertical curve length to conform with the area and design speed, at 45 locations.

The consultant has considered the criteria for additional lane for trucks or climbing lane at steep slopes where radius of curves are narrow in order to climb up. This causes traffic speed of the trucks to decrease and results in vehicles to be at risk of overtaking accidents. Therefore, additional lanes need to be designed for trucks, at 7 locations.

Installation of Roadside Barriers such as Steel Beam Guard Rail, Concrete Barrier and Guide Post.

Installation of Regulatory Signs, Warning Signs and Guide Signs based on the International Standard at appropriate areas.

Consider the design of Pavement Markings based on the International Standard at the appropriate areas.