Standard plans · Illinois
IDOT standard plans
IDOT publishes the standard plans and standard drawings required on Illinois construction projects. The authoritative set always lives on the agency's official site — linked below — and every sheet opens in the PDFDepth workspace for markup, measurement, and review.
Open an IDOT sheet in PDFDepth
Find the sheet on the IDOT site, copy the PDF link, and paste it here — the workspace opens it in your browser. Nothing is uploaded for storage; marking up and measuring happen on your device.
What IDOT standard plans cover
- Drainage details — inlets, pipe bedding, culverts, endwalls, and underdrain
- Traffic control and signing — sign supports, pavement markings, temporary traffic control
- Roadside safety — guardrail, barriers, attenuators, and terminal treatments
- Pavement and earthwork — typical sections, joint details, slope treatments
- Structures — retaining walls, noise walls, traffic signals, lighting, and ITS supports
Coverage varies by state — always verify against the current edition on the official IDOT site. PDFDepth is not affiliated with IDOT or the State of Illinois.
Other state DOTs
Review IDOT sheets properly
Markup, measure, takeoff, and AI plan review — on the PDF, in the browser, free to start.
Open the workspace