DTCD Platform · Sign Symbol Library

MUTCD Work-Zone Sign Library

46 sign types · and growing

Every symbol below is drawn to MUTCD conventions and used across the DTCD platform — on the field app's capture screens, on closure maps, and as typed sign records in the WZDx / CWZ data feeds. When a crew places one of these in the field, downstream systems receive it as structured, machine-readable data.

Warning (W)

W20-1

W20-2

W20-3

W20-4

W20-5

W20-5a

W20-5b

W20-5c

W20-5L

W20-5R

W20-7

W21-1

W21-2

W21-5

W21-5a

W21-6

W21-7

W21-8

W23-1

W23-2

W3-1

W3-2

W3-3

W3-5

W4-1

W4-2

W4-2L

W4-2R

Regulatory (R)

R1-1

R1-2

R11-2

R2-1

R4-7

R5-1

R9-10

R9-9

Route Markers & Detour (M)

M4-10

M4-9

M4-9a

M4-9L

Guide (G)

G20-1

G20-2

G20-4

Exit / Guide (E)

E5-2

E5-2a

E5-3

DTCD's on-device AI classifier currently auto-recognizes the highest-frequency work-zone sign codes at capture time, with coverage expanding toward the full MUTCD Part 6 temporary-traffic-control set — an objective of PurposeBuilt Systems' federal research program. Signs outside the auto-recognition set can always be documented manually with the same structured output. Sign designs follow the FHWA Manual on Uniform Traffic Control Devices; MUTCD sign designs themselves are in the public domain.