In general, the geometric planning of roads is done manually using drawing tools and mathematical techniques. When done manually, geometric design is complicated, time-consuming, and prone to errors. Therefore, this study will use AutoCAD Civil 3D®. This study aims to redesign the Trans Flores road because of the frequent accidents found on curves and climbs and the current road drops on the Trans Flores road. This study will use research methods using secondary data and qualitative research methods. When designing geometric roads using AutoCAD Civil 3D®, data from Google Maps, Google Earth, and Global Mapping is also required. This research will focus on the 3.5 km of road traffic starting from Sta 0+000 to Sta 3+500. The result of this study is that corners P1-P4 are planned with the type of Bend S-C-S. By using AutoCAD Civil 3D®, this research can be completed quickly and accurately.

Easy community life, both in terms of economic, social, educational, and others, is the purpose of designing and constructing access roads or connecting roads. In addition, road design must consider safety aspects to achieve safe, balanced, and sustainable road performance. In this study, a manual horizontal alignment road design was carried out to link the road of Jalan Plupuh Tanon and Jalan Gabugan Sragen Section 1 from STA 0 + 000 to STA 2 + 257,221 with the planning of three bend points guided by Highway Design Standard of Indonesia 2021. Primary data in the form of coordinates and contours are taken from Google Earth and the Global Mapper. The design starts by managing primary data and calculating the elements that make up the horizontal alignment so that a road with a design speed of 30 km/h is obtained, the value of e = 8%, and a radius of 200 m. Three horizontal alignment points use a Spiral-Circle-Spiral (SCS) arch with an intermediate curve (Ls) value of 38 m and a circular arch (Lc) of 44.229 m, respectively.