The Raghunathpur (Hulaki Rajmarg) Sonama Tarhari Sundarpur Road passes through ward no. 3, 2, 1, and 7 of the Sonama Rural Municipality of Mahottari District and connects with Postal Highway (H17). The road starts from Raghunathpur near the Maraha River Bridge of Sonama Rural Municipality-3 and ends at Sundarpur of Ward no. 7 of the same rural municipality. The road passes through different settlements like Gobarhiya (2+700), Tarhari (4+420 to 5+260), Musahartol (7+000 to 7+400), and Sundarpur (7+960 to 8+384). The total length of the proposed road is 8.384 km. The total formation width of the proposed road will be 8.50 m (without drain), a carriageway width of 5.5 m, and a shoulder width of 1.50 m on either side and side drain of 1 m on either side in settlement area.