Design and analyse a road from the traffic to the line marking. Lay out the horizontal alignment by dragging the intersection points — clothoid transitions, circular curves, superelevation and widening follow — and shape the vertical alignment by dragging the VPIs over the ground profile, with crest and sag K values checked against stopping sight distance. The studio computes the sight distance actually available along the road, builds cross-sections from the template, works out cut and fill and the mass-haul diagram, designs the pavement for the traffic (Austroads, AASHTO 93 or UK practice, flexible or rigid), sizes the table drains, kerb inlets and culverts, and times a signalised intersection. Drive the road with a chainage slider, then take the A3 drawing set, a 3D corridor model, the construction sequence with hold points and ITP, quantities, cost, programme and a design Excel workbook.
Preliminary design for feasibility and education. Use survey and geotechnical data for the site, apply the road authority's standards and supplements, complete a road safety audit, and have the design checked by a qualified road engineer. The sample project is synthetic.
What the road studio does
Geometric design to Austroads AGRD (Australia), the AASHTO Green Book (US and AASHTO), RHD standards (Bangladesh) or DMRB CD 109 (UK): stopping and intersection sight distance, minimum radius from superelevation and side friction, clothoid transitions, superelevation by the AASHTO method 5 distribution with its development, curve widening and advisory speeds, and crest and sag curves checked against SSD, headlight and comfort criteria.
The alignment is edited on the drawings: drag the intersection points on the plan and the VPIs on the long section, or type coordinates, radii, transitions, levels and curve lengths. The sight distance actually available is computed every 10 m for crests and for the lateral clearance on curves.
Cross-sections come from the template (lanes, shoulders, median, crossfall, kerbs or table drains, batters) over the ground with its cross-slope; cut and fill areas, end-area volumes and the mass-haul diagram with balance points and haul follow. Pavements are designed for the traffic in ESA: the Austroads granular chart with an Odemark–Boussinesq subgrade strain check, AASHTO 93 flexible and rigid, or an indicative UK design. Drainage covers the rational method, table drains, kerb and channel spread and inlet spacing, and culvert sizing; signals by Webster.
A chainage slider drives a car along the road with the plan, long section and cross-section updating; the original crest and sag simulator is kept as a tab.
Outputs: A3 drawing set (plan, long section with data bands, typical sections, cross-sections, superelevation, pavement, mass haul, drainage, sight distance, construction stages, programme), a 3D corridor model, construction sequence with hold points, ITP, WHS and environment, bill of quantities and estimate, design report and an Excel workbook with live formulas.