Lane and divider sign pictures — District of Columbia Permit Test
Lane and divider sign pictures on the District of Columbia permit test — 6 rules, each with the reason behind it and a question on it while it is fresh.
The rules
This sign means merging traffic from the right is just ahead.
Cars joining from the right need room, and seeing them coming lets you adjust before you are side by side.
Merging traffic from the right is just ahead.
This sign means the highway ahead splits into two separate one-way roadways divided by a median or divider; keep right.
Once the road splits, the left side carries traffic toward you, so you stay on the right of the divider.
The highway ahead is split into two separate roadways by a median or divider and each roadway is one-way.
This sign means the highway ahead no longer has a median or divider; traffic goes in both directions, so keep right.
Without the divider, oncoming cars are just a painted line away from you.
The highway ahead no longer has a median or divider. Traffic goes in both directions. Keep right.
This sign means a traffic island, median or barrier is ahead; keep to the side the arrow shows.
Passing the island on the wrong side puts you in the lane meant for oncoming traffic.
A traffic island, median or barrier is ahead. Keep to the side indicated by the arrow.
This sign means the right lane ends soon; drivers in it must merge left when space opens, and drivers in the left lane should let them merge smoothly.
Both lanes are about to share one, and it goes smoothly when one driver moves over and the other makes room.
The right lane ends soon. Drivers in the right lane must merge left when space opens up.
This sign means you are entering a two-way road; keep to the right because traffic travels in both directions.
After a one-way stretch it is easy to drift left, and here the left lane has cars coming at you.
Keep to the right because you are entering a two-way road. Traffic will travel in both directions.
On the test
What does this sign warn you of?
Traffic merging from the right. Cars joining from the right need room, and seeing them coming lets you adjust before you are side by side. DC Driver Manual, p.102: “Merging traffic from the right is just ahead.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
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All District of Columbia permit topics
Where these come from
Every rule here is checked against DC Driver Manual, published by the District of Columbia Department of Motor Vehicles, and against the state code itself. Last checked 2026-10-05.
- src/assets/drivers-manuals/DC.pdf (DC Driver Manual (English), Rev. 7/29/2021, District of Columbia Department of Motor Vehicles, fetched 2026-10-05 from the Wayback Machine's original-bytes capture of dmv.dc.gov; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/DC.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- https://dmv.dc.gov/publication/dc-dmv-automobile-driver-manual (read 2026-10-05; links only the 2023 Issuu flipbooks)
- https://issuu.com/dcdmv/docs/dc_dmv_driver_manual_english_revised_final (the current 2023 edition, read 2026-10-05 from its public page images to diff against the pinned edition; not pinnable)
- https://dmv.dc.gov/service/knowledge-tests (read 2026-10-05; states no count or mark for the knowledge test)
- https://dcregs.dc.gov/Common/DCMR/RuleList.aspx?ChapterNum=18-1 (18 DCMR chapter 1, sections 100-114, read 2026-10-05; section 104 sets what the examination covers and states no figure)
- https://code.dccouncil.gov/us/dc/council/code/sections/50-1401.01 (D.C. Code 50-1401.01, read 2026-10-05; requires a knowledge examination and states no figure)