Standard Details

View or download MicroStation versions (.DGN) of these standard details at our Dropbox location

100 General

  1. LC0000_Materials Letting Drainage Structure Detail (PDF)
  2. LC0011_Typical Turn Lanes and Bypass Lane (PDF)
  3. LC0012_Five Lane to Two Lane - Drop or Add (PDF)
  4. LC0013_Radius with Tangent Offset - In Lieu of 3-center Curve (PDF)
  5. LC0020_Trench Widths for Trench Backfill and Pavement Replacement Bituminous (PDF)
  6. LC0021_Drainage Facilities and Earthen Berm Constructed Adjacent to Highway ROW (PDF)

200 Earthwork, Landscaping and Erosion Control

  1. LC2000_Undercut Detail (PDF)
  2. LC2050_Temporary Ditch Check Installation for Roadway or Drainage Ditch (PDF)
  3. LC2051_Perimeter Erosion Barrier Installation (PDF)
  4. LC2100_Dry Rubble Stone or Broken Concrete Tree Wells (PDF)
  5. LC2101_Segmental Concrete Block Wall (PDF)
  6. LC2200_Vegetation Maintenance Required Clearance for 10' Bikepath (PDF)

300 Subgrade, Subbase and Base Course

  1. LC3000_Curb and Gutter Subgrade Options (PDF)

400 Surface Course, Pavement, Rehabilitation, and Shoulder

  1. LC4000_Typical 2 Lane Section (PDF)
  2. LC4001_Typical 2 Lane Section with Adjacent Multi-Use Path (PDF)
  3. LC4010_Typical 3 Lane Section (PDF)
  4. LC4011_Typical 3 Lane Section with Adjacent Multi-Use Path (PDF)
  5. LC4020_Typical 5 Lane Section - 11' Lanes (PDF)
  6. LC4021_Typical 5 Lane Section - 12' Lanes (PDF)
  7. LC4025 Typical LJS Application (pdf)
  8. LC4030_Typical Intersection Approach with Left and Right Turn Lanes (PDF)
  9. LC4031_Typical Intersection Approach with Lt and Rt Turn Lanes and Adjacent Multi-Use Path (PDF)
  10. LC4040_Typical Superelevated Section - 3R and Resurfacing Projects (PDF)
  11. LC4041_Typical Superelevated Section - New Roads and Reconstruction Projects (PDF)
  12. LC4050 Typical Section Aggregate Bikepath (PDF)
  13. LC4051_Typical Section 8' Hot-Mix Asphalt Bikepath (PDF)
  14. LC4052_Typical Section 8' Hot-Mix Asphalt Bikepath in Vicinity of Curb and Gutter (PDF)
  15. LC4053_Typical Section 10' Hot-Mix Asphalt Bikepath (PDF)
  16. LC4054_Typical Section 10' Hot-Mix Asphalt Bikepath in Vicinity of Curb and Gutter (PDF)
  17. LC4100_Typical Minor Access - Private Entrance (PDF)
  18. LC4101_Typical Major Access - Commercial Entrance (PDF)
  19. LC4102_Typical Major Access - Side Road (PDF)
  20. LC4103_Hot-Mix Apron for Aggregate Field Entrance (PDF)
  21. LC4110_Typical Minor Access Treatment on Resurfacing Projects (PDF)
  22. LC4111_Typical Major Access Treatment on Resurfacing (PDF)
  23. LC4120_Mailbox Turnout Along Uncurbed Roads (PDF)
  24. LC4121_Mailbox Turnout Along Curbed Roads (PDF)
  25. LC4200_Curb and Gutter at Flat Areas of Pavement (PDF)
  26. LC4201 Detectable Warnings and Pedestrian Pushbutton Locations (PDF)
  27. LC4202_Concrete Washout Facilities (PDF)
  28. LC4203_Median Sidewalk Detail (PDF)
  29. LC4204_Curb Flares for Sidewalks (PDF)
  30. LC4800_Transition from Aggregate Shoulder to B-6.24 for 17' Offset to Face (PDF)
  31. LC4801_Transition from Aggregate Shoulder to B-6.24 for 18' Offset to Face (PDF)
  32. LC4802_Transition from Aggregate Shoulder to B-6.24 for 20' Offset to Face (PDF)
  33. LC4820_Hot-Mix Asphalt Apron for Structures in Aggregate Shoulders (PDF)
  34. LC4821_Hot-Mix Asphalt Apron for Handholes in Aggregate Shoulders (PDF)

500 Structures

  1. LC5400_Tree Preservation with Storm Sewer in Uncurbed Areas (PDF)
  2. LC5401_Typical Placement of Precast End Sections on Cross-Road Culverts (PDF)
  3. LC5402_Joint Ties for Concrete Pipe (PDF)
  4. LC5403_Grating for Concrete Flared End Sections (PDF)

600 Incidental Construction

  1. LC6000_Restricted Depth Manhole (PDF)
  2. LC6001_Inlet Special - Std 542546 - Double - Flat Grates (PDF)
  3. LC6002_Inlet Special - Std 542546 - Double - Sloped Grates (PDF)
  4. LC6003_Drainage Structure Elevations and Offsets (PDF)
  5. LC6020_Subsurface Drains (PDF)
  6. LC6050_Restrictors for Median Inlet Box (PDF)
  7. LC6060_Perforated Riser Pipe Detail (PDF)
  8. LC6304_HMA Shoulder for Guardrail and Traffic Barrier Terminals (PDF)
  9. LC6310_Traffic Barrier Terminal Type 1 Special - Tangent (PDF)
  10. LC6350 Guardrail Location and Clearance Near Trees Speed Greater than 45 mph (pdf)
  11. LC6600_Ornamental Fence - Classic 2 Rail (PDF)
  12. LC6601_Ornamental Fence - 3 Rail (PDF)
  13. LC6602_Ornamental Fence - 3 Rail with Rings (PDF)
  14. LC6610 Bicycle Railing Special (pdf)
  15. LC6625 Back Side Protection of Guardrail (pdf)
  16. LC6650_Witness Post (PDF)

700 Work Zone Traffic Control and Protection, Signing, and Pavement Marking

  1. LC7000_Modified Std 701011 - 2 Lane, 2 Way, Off-Road Operations, Day Operations Only (PDF)
  2. LC7003_Modified Std 701701 - Urban Lane Closure, Multilane Intersection (PDF)
  3. LC7004_Side Road Signing (PDF)
  4. LC7005_Typical Lane Closure, 3 Lane Road Section (PDF)
  5. LC7006 Single Lane Roundabout Traffic Control (PDF)
  6. LC7200_Direction Indicator Barricades (PDF)
  7. LC7201_Temporary Construction Information Signs (PDF)
  8. LC7202_Modified MUTCD Typ Application TA-3 Shoulder Closure and Taper for Changeable Message S (PDF)
  9. LC7203_Work Zone Speed Limit Signing Diagram (PDF)
  10. LC7800_Typical Pavement Markings for County Highways (PDF)
  11. LC7801_On Street Bicycle Lane Pavement Marking and Signing Details (Rev.10-2012) (PDF)
  12. LC7802_Short Term Pavement Markings (PDF)
  13. LC7803_Typical Pavement Markings for Railroad Crossings on County Highways (PDF)
  14. LC7804_Special Detail for Roundabout Signing and Pavement Marking (PDF)
  15. LC7805_Recessed Reflective Pavement Marker (PDF)

800 Electrical

  1. LC8502_Rectangular Rapid Flashing Beacon (RRFB) System (PDF)
  2. LC8600_Typical Detector Loop Layouts (PDF)
  3. LC8900_Video Detection Details (PDF)
  4. LC8902_Wireless Transmission System Details (PDF)

Traffic Standard Details

  1. LCDTR1_Detour Sheets (PDF)
  2. Standard Details TS-05 IDOT D-1 TRAFFIC SIGNALS (PDF)
  3. BD-55 IDOT D-1 Center Line Rumble Strip