- Intersection of John and Front Streets
- Wheelock 7002 at Miller Hall
- Standard bell at Maury Hall
- Standard horn with double projector
- Wheelock strobe at Rosslyn Center
- SpectrAlert fire alarm horn/strobe at Benjamin Franklin Middle School
- Standard 4-350 horn with Space Age AV32 light plate
- SIGNAL (RED) AHEAD
- Edwards fire bell in Crystal City Underground
- Trafflc signals over Bluestone Drive and Duke Drive [02]
- Trafflc signals over Bluestone Drive and Duke Drive [03]
- Trafflc signals over Bluestone Drive and Duke Drive [01]
- Allied Arts Building
- East Main Street and Court Street
- Rosslyn tunnel portal
- Wheelock MT horn
- Hampton Roads Bridge-Tunnel, westbound [03]
- Hampton Roads Bridge-Tunnel, westbound [02]
- Sign for Exit 268
- Metro and CSX tracks in Northeast DC
- Metro D Route pocket track [01]
- Traffic signal in Scott Circle
- Greenbelt interlocking
- College Park interlocking [01]
- College Park interlocking [02]
- Metro D Route pocket track [02]
- CSX Capital Subdivision tracks
- Interlocking signal at Anacostia station
- Traffic light along M Street NW
- Silver Spring pocket track
- Largo Town Center interlocking
- Signal at Branch Avenue rail yard
- "Darth Vader" railroad signals
- Road sign at intersection of US 1 and Joplin and Fuller Roads
- Directional signage at the end of the ramp for Interstate 64, Exit 99 at Rockfish Gap
- Older-style pedestrian crossing signs
- Traffic signal at 15th and G Streets NW
- Traffic signal with yellow aspect open
- Traffic light at Main Street and Dover Road
- Mircom Fire Alarm horn/strobe
- Interior of 2012 Kia Soul
- Traffic signals in Philadelphia
- Traffic lights at North Avenue and Fremont Street
- Yellow traffic signal
- Pedestrian signal at 7th Street and Pennsylvania Avenue SE
- Railroad signals in Cumberland [01]
- Railroad crossing lights at Baltimore Street
- Railroad signals in Cumberland [02]
- Traffic light at Park and Williams Streets [01]
- Traffic light at Park and Williams Streets [02]
- Traffic signal with cameras
- Sidewalk on 1700 block of Aliceanna Street
- Pedestrian signal at 15th and P Streets NW
- Storm clouds at Georgia Avenue and Norbeck Road
- Damaged traffic signal in Evanston, Illinois [01]
- Damaged traffic signal in Evanston, Illinois [02]
- Fire alarm at Staunton Mall [01]
- Woman riding motorcycle
- Georgia Avenue and Dennis Avenue
- Traffic signal communication splicing box along Great Seneca Highway [01]
- Traffic signal communication splicing box along Great Seneca Highway [02]
- Traffic lights outside Greensboro station
- Railroad signal at Patapsco Valley State Park [01]
- Railroad signal at Patapsco Valley State Park [02]
- Halethorpe MARC station [01]
- Halethorpe MARC station [02]
- HAWK beacon at 16th and Jonquil Streets NW [01]
- HAWK beacon at 16th and Jonquil Streets NW [02]
- Edwards chime
- Traffic light in Bala Cynwyd
- Pedestrian signal call button
- Ellenco 350 fire alarm horn [02]
- Ellenco 350 fire alarm horn [01]
- Wheelock 7002 at a Comfort Inn [01]
- Photographing a fire alarm
- Wheelock 7002 at a Comfort Inn [02]
- Wheelock 7002T with projector device
- Railroad crossing signal at Route 608 [02]
- Railroad crossing signal at Route 608 [03]
- Vintage US&S railroad signals [03]