Plan your traffic control details
MDOT TTC Typical Selector
Browse MDOT construction, maintenance, and survey traffic typicals. Download a combined PDF for GI and the preliminary spec book, a ZIP for final submittal, or a Word table for Maintenance of Traffic (MOT).
RCOC construction projects: Use Construction typicals for their speed-reduction provisions.
MDOT typical filename legend Read the full code, including lane counts and suffixes
Start with the typical number, then read the codes separated by hyphens. Codes describe the roadway, work, location, or traffic control. Their order and combination vary by detail. The MDOT code filter matches codes throughout the filename. Numbered variants share their base code: 1LC and 2LC match LC; CLT(7) matches CLT; 2(R)SHIFT matches SHIFT and (R). A direction code can describe a closure or a shift; review the drawing.
Read a complete filename
152-CLT(7)-3(1R+2L)LC-2(L)SHIFT.pdf
- 152
- Typical number.
- CLT(7)
- Center left-turn lane; seven lanes total.
- 3(1R+2L)LC
- Three lanes closed: one right lane and two left lanes.
- 2(L)SHIFT
- Two lanes shifted to the left.
- PDF document format.
160-INT-LD-CLT-MID reads as typical 160: intersection, long duration, center left-turn lane, middle of the intersection or road.
| Code | Meaning |
|---|---|
| GEN | General information |
| M | Maintenance |
| S | Survey |
| SP | Special |
| FW | Freeway |
| NFW | Non-freeway |
| CLT | Center left-turn lane |
| CLT(7) | Center left-turn lane; seven lanes total |
| INT | Intersection |
| EnR / ExR | Entrance ramp / exit ramp |
| GORE | Freeway gore area |
| GORE(4) | Gore treatment on a four-lane freeway |
| Code | Meaning |
|---|---|
| L / LANE | Lane; 2L means a two-lane roadway |
| (L) / (R) | Left / right, in the direction of traffic; also used inside expressions such as 1R+2L |
| IN / (IN) | Inside |
| OUT | Outside of shoulder |
| MID | Middle of intersection or road |
| O | Outside lane closure |
| C | Closure |
| LC | Lane closure; 1LC closes one lane, 2LC closes two, and 0LC indicates no lane closure |
| LO | Lane open |
| SHL | Shoulder closure; also used on maintenance and survey shoulder-work details |
| SHIFT | Lane shift |
| PARK | Parking lane |
| CROSS | Crossover |
| Code | Meaning |
|---|---|
| TR | Traffic regulator |
| TS | Temporary signal |
| AFAD | Automated flagger assistance device |
| AB | Arrow board |
| AW | Advance warning |
| SIGN | Sign or signing; DUAL-SIGN means dual signing and SINGLE-SIGN means single signing |
| SPEED | Speed |
| PCMS | Portable changeable message sign |
| RUM | Rumble strip |
| FREE / YIELD | Free-flow / yield condition at an entrance ramp |
| LD / SD | Long duration / short duration; intersection details 160–163 cover work longer than one hour, and 164 covers less than one hour |
| MOB | Mobile operation |
| Code | Meaning |
|---|---|
| EM | Early merge |
| ZIP | Zipper merge |
| STA | Stopped traffic advisory |
| ROLL | Rolling roadblock |
| HAUL | Haul road crossing |
| PATCH | Concrete patching |
| CruSha | Crush and shape |
| PULLOFF | Emergency pull-off signing |
| 2MILE | Two-mile advance-warning sequence |
| KEY | Typical numbering key |
| NOTES | Typical notes |
| SPACING-CHARTS | Spacing tables and charts |
Numbers, parentheses, and letter suffixes
- Typical number: The current construction series uses 100–380, maintenance uses 4000-series numbers, and survey uses 5000-series numbers.
- Lane counts and sides:
2(R+L)LCmeans two lane closures, one right and one left.(1-2)LCmeans one- to two-lane closure.1(CLT)identifies a center left-turn lane closure. - Shift counts:
2(R)SHIFTandSHIFT-2(R)describe two lanes shifted right;1(L)SHIFTdescribes one lane shifted left. - Crossover counts: The final
(1)in 311 and(2)in 312 identify single and dual crossover closures. - A / B after the number: Different versions of that typical. The distinction depends on the typical: 4110A/B differ in speed reduction, while 5182A/B differ in traffic-control and traffic-volume conditions. Read the title and drawing for the specific version.
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Includes required typicals 100–104 · Your choices are saved in this browser
Add project-specific details using the arrows. Required typicals 100–104 are already included below.
Always included 0
Required typicals 100–104 are included in every project and cannot be removed. Each appears once in the Word table, combined PDF, and ZIP.
Required for the PDF title page. Your packet includes an index and page numbers.
For GI and the preliminary spec book. Combines your details into one PDF with a project title page, index, and page numbers.
For final submittal to MDOT Specs and Estimates. Packages individual original PDFs, named by typical number, for upload through ProjectWise.
For Maintenance of Traffic (MOT). Creates an editable Word table listing each typical number and title for your MOT section.