👉Main Types of Drawings in Road Projects

🏷1) Construction Drawings (Working Drawings)

⏺These are the drawings the contractor uses to actually build the road.

🔰They usually include:

• Road alignment plan
• Profile (longitudinal section)
• Cross-sections
• Pavement structure details
• Drainage layout
• Culverts/bridges details
• Quantities and dimensions
• Material specifications

📍Purpose:

⏺Give full instructions for execution on site.

🏷2) Typical Drawings

⏺Standardized sketches used repeatedly along the project.

🔰Examples:

• Typical road cross-section
• Typical shoulder detail
• Standard pavement layer compositions
• Standard culvert inlet/outlet
• Standard ditch profile
• Guardrail installation typical
• Pavement marking typical layouts

📍Purpose:

⏺Avoid redrawing the same details everywhere; ensures uniform design.

🏷3) Alignment Drawings (Plan View)

⏺Shows the horizontal layout of the road.

📍Includes:

• Centerline
• Curves and radii
• Stations (chainage)
• Road width
• Intersections
• Right-of-way

📍Purpose:
Defines the exact path/location of the road.

🏷4) Longitudinal Profile (L-Section)

⏺A vertical view along the centerline.

📍Shows:

• Existing ground level
• Proposed finished road level
• Grades (slopes)
• Vertical curves
• Drainage flow direction

📍Purpose:

⏺Controls the vertical geometry of the road.

🏷5) Cross-Section Drawings

⏺Perpendicular cut at intervals (e.g., every 20m).

📍Includes:

• Road layers
• Embankment/cut details
• Side slopes
• Drainage channels
• Ditches
• Berms
• Service ducts if any

📍Purpose:

⏺Shows earthwork, widths, and pavement layers at each station.

🏷6) Pavement Design Drawings

⏺Focused on the pavement structure.

📍Shows:

• Subgrade level
• Sub-base
• Base course
• Asphalt layers
• Material specifications

📍Purpose:

⏺Defines pavement thickness and materials based on design traffic + soil.

🏷7) Structure Drawings (For Bridges & Culverts)

📍Includes:
• Box culverts
• Pipe culverts
• Retaining walls
• Bridges (abutments, piers, deck, girders)
• Expansion joints
• Reinforcement details

📍Purpose:
All drawings related to specific structures along the road.

🏷8.  Drainage Drawings

⏺Used to manage stormwater.

📍Shows:
• Side ditches
• Catch basins
• Stormwater pipes
• Channels
• Culvert sizes/locations
• Energy dissipators

📍Purpose:
Prevent flooding and protect the pavement.

🏷9) Traffic Control & Road Safety Drawings

📍Includes:
• Road signs
• Pavement markings
• Guardrails
• Speed bumps
• Traffic islands
• Signal layout (if any)

📍Purpose:
Ensures safety and regulates traffic.


🏷10) Utility Relocation Drawings

⏺Shows existing and proposed utility lines.

📍Includes:
• Water lines
• Electric cables
• Telecom ducts
• Sewer lines
• Gas lines (if applicable)

📍Purpose:
Coordinate with utility agencies and avoid conflicts during construction.


🏷11) Quantity & Earthwork Drawings

⏺Used for measurement and BOQ.

📍Shows:
• Cut and fill diagrams
• Earthwork volumes
• Borrow pit & spoil locations

📍Purpose:
⏺Supports cost estimation and progress payment.

📚 12) As-Built Drawings

⏺Prepared after construction.

📍Shows:
• Actual constructed dimensions
• Field changes
• Final alignment & profile
• Final structures & drainage
• Updated utility routes

📍Purpose:
⏺Official record for future maintenance and upgrades.

@etconp