Roadway Pavement Markings Data
About
In the fall of 2017, DDOT contracted with Cyclomedia on a project to perform an automated extraction of the pavement markings on DC roadways
Data structure
FID | Unique ID |
|---|---|
Geometry | Binary geometry (Shapefile only, not in excel) |
X | X-coordinate |
Y | Y-coordinate |
Z | Z-coordinate |
stdx | Standard deviation in X |
stdy | Standard deviation in Y |
stdz | Standard deviation in Z |
Type | Type of road marking. See table in 2.6 for the different types. |
Text | The text of text/numerical markings |
Condition | The physical condition of the road marking. This attribute is optional. |
Feature Types
Type of feature | Geometry | Annotation example | Comments |
|---|---|---|---|
Reversible Lane Marking | Line |
| |
Transverse stop lines (stop bar) | Line |
| |
Double Lines | Line |
| |
Solid Lines | Line |
| |
Broken Lines | Line |
| |
Dotted Lines | Line |
 | |
Yield Lines | Line |
| |
Do Not Block Intersection Markings | Polygon |
| In case there is no box (only text), this will be annotated as text |
Do Not Block Intersection Markings | Polygon |
| |
Do Not Block Intersection Markings (text-filled) | Polygon |
| |
Cross Walks | Lines |
| |
Cross Walks (longitudinal striping) | Lines |
| |
Cross Walks (diagonal striping) | Lines |
| |
Text and numerals | Point |
| Including actual text |
Arrow markings | Point |
| Any type of arrow markings, such as (but not limited to) Through lane , Turn Lane, Wrong Way, Bike Lane and Lane reduction arrows, Arrow like features used for speed humps will be annotated as speed hump symbols. |
HOV Lane Symbol | Point |
| Diamond symbol for HOV (High Occupancy Vehicle) lanes |
Bike Lane Symbol | Point |
 | |
Yield ahead Symbol | Point |
| |
Speed Hump Markings | Point |
| Only the types shown in the MUTCD will be annotated. |
Route Shield (Interstate) | Point |
| Including text |
Route Shields (US Route) | Point |
| Including text |
Route Shields (State Route) | Point |
| Including text |
Advance Warning Markings for Speed Humps | Line |
| One longitudinal line through the center off all bars. |
Diagonally hatched markings | Point |
| For all diagonally hatched marking except Cross walks. A point is placed near the center of the filled area. Any lines around the area will be annotated separately. |
Cross-hatch markings | Point |
 | For all cross hatched marking except Cross walks. A point is placed near the center of the filled area. Any lines around the area will be annotated separately. |
Chevron markings | Point |
 | For all chevron markings except speed hump markings. A point is placed near the center of the filled area. Any lines around the area will be annotated separately. |
Speed reduction markings | Line |
 | |
Parking space markings | Line |
| Longitudinal outline, without cross markings. |
Accessibility Parking Space Marking | Point |
|
Project Proposal/Offering
For more information about this project, please check out the copy of the project brochure below.