Quick Answer
Road markings provide instructions, restrictions and warnings. Read them together with signs, signals and the wider road layout rather than relying on one marking alone.
Broken Centre Lines
Short broken white lines normally separate opposing traffic. You may cross them when it is safe and legal, but remain on your side unless overtaking or changing position is necessary.
Hazard Warning Lines
Longer lines with shorter gaps warn that a hazard may be ahead, such as a bend or junction. Reduce risk by improving observation and preparing to adjust speed.
Double White Line Systems
Where the line nearest you is solid, you must not cross or straddle it except in limited circumstances set out in the Highway Code.
Where the nearest line is broken, you may cross if it is safe and you can complete the manoeuvre before reaching a solid line on your side.
Single and Double Yellow Lines
A single yellow line normally means waiting restrictions apply at certain times. Double yellow lines normally mean no waiting at any time.
Loading rules and exemptions may differ, so check nearby signs and kerb markings.
Yellow Box Junctions
Do not enter a box junction unless your exit is clear. An exception can apply when turning right and prevented from doing so by oncoming traffic or other vehicles waiting to turn right.
Plan early so you do not block crossing traffic.
Bus Lanes
Bus-lane signs show operating times and permitted vehicles. Outside operating hours, other
vehicles may sometimes use the lane.
Do not assume every bus lane has the same rules.
Cycle Lanes
Cycle lanes may be marked by solid or broken white lines. Give cyclists space and check carefully before crossing a lane to turn or enter another road.
Lane Arrows and Road Text
Arrows and words such as TURN LEFT, AHEAD ONLY or SLOW help drivers select the correct lane and prepare early.
Avoid last-minute lane changes when the markings show you are in the wrong position.
Keep Clear and School Markings
Keep-clear markings protect access, junctions or areas where stopping would create danger or obstruction. School entrance markings may be supported by signs showing restricted stopping times.
Red Routes and Kerb Markings
Red lines indicate stronger stopping restrictions in some urban areas. Yellow kerb marks indicate loading restrictions and should be read with nearby signs.
Next Step
Review road markings during theory study, then ask your instructor to identify them in real traffic. Practical context makes the rules easier to remember.
Sources
The Highway Code: road markings; Traffic Signs Manual and Know Your Traffic Signs.
