This AutoCAD LISP script automates the creation of curb offsets by instantly applying predefined widths and layers to selected linework. OffsetCurb is a functional LISP utility designed to streamline the repetitive task of drafting curb profiles within an AutoCAD environment. By automating the offset process, it ensures consistent geometry and layer assignment across complex site plans and road layouts. The tool functions by taking user-selected lines or polylines and projecting them at a set distance, immediately placing the resulting geometry onto a designated curb layer. This eliminates manual offset commands and layer management, providing a precise and efficient method for generating standard kerb and gutter details in infrastructure documentation.

The download is a single file containing .LSP files.

To use this LISP routine, load the file into the current AutoCAD session using the APPLOAD command. Once loaded, execute the assigned command alias to initiate the routine. Users select the target linework, and the script automatically performs the offset based on the predefined width parameters. This workflow significantly reduces drafting time when working on extensive site plans, ensuring that all curb elements maintain correct layer standards and geometric accuracy throughout the project lifecycle.

This utility is essential for civil engineers, landscape architects, and urban designers working on site planning and infrastructure projects. It is particularly valuable during the schematic and design development phases where road networks, parking lots, and pedestrian walkways are frequently revised. By maintaining consistent curb offsets across large-scale developments, it facilitates cleaner drawing sets and faster iteration. Professionals looking to improve productivity in AutoCAD road drafting will find this tool highly effective for managing complex site geometry and standardizing CAD output.