SG Singapore Driver
Knowledge base road rules 4 min read

Yellow-box junctions

Entering a yellow-box junction and obstructing other traffic is an offence even on a green light. The Traffic Police handbook also describes three situations that are not penalised.

yellow-box junction Road Traffic Rules Highway Code

Primary source: https://sso.agc.gov.sg/SL/RTA1961-R20?DocDate=20251230&ValidDate=20260101

A yellow box is indicated by yellow lines connecting the four corners of an area of road at a road junction or on any part of the road, as shown in diagrams 140(a) to 140(d) of the Traffic Signs Rules (SSO, Road Traffic (Traffic Signs) Rules r 7(8)).

The offence

Any person who drives or rides, or turns a vehicle or part of it, into a yellow box indicated by yellow lines connecting the four corners of (SSO, Road Traffic Rules r 26):

  • a road junction, hatching the junction diagonally, notwithstanding that the light signals controlling vehicular traffic permit him to do so; or
  • an area of road at a road junction or on any part of the road as defined under rule 7(8) of the Traffic Signs Rules, notwithstanding that he has the right of way,

and by doing so causes obstruction to any other vehicle proceeding to or along that road junction or any part of the road, shall be guilty of an offence.

The offence is entering the box and causing obstruction. This article does not turn that into a slogan that “you must never enter a yellow box.”

What the official handbook adds

The official Basic Theory of Driving handbook, which Traffic Police describe as covering the Highway Code, states: it is an offence for any driver to drive into a junction marked with a yellow box and cause obstruction even if the lights are in his or her favour. It then describes three situations in which a driver or rider will not be penalised for entering the yellow-box junction (SPF, Basic Theory of Driving):

  1. Turning vehicles that would not block others. Only drivers of turning vehicles that would not obstruct other traffic if the lights changed may enter the yellow box when their exit lanes from it are blocked. Vehicles that would obstruct traffic should wait behind the stop-line.
  2. Waiting in the box to turn right against oncoming traffic. Those drivers can remain in the box until a suitable opportunity arises. Should the lights turn red against them, they should proceed to complete their turn and clear the yellow-box junction.
  3. Waiting in the box to turn left or right because pedestrians are crossing. Drivers may enter the yellow box even when they are prevented from executing their turns by pedestrians using the crossings.

The same handbook’s common-road-markings note for a yellow box is: do not drive into the yellow box when traffic has come to a standstill at the left lane; give way to vehicles from the side road entering the main road (SPF, Basic Theory of Driving).

Composition in the official handbook

Stopping in a yellow box is listed in the handbook’s scheduled-offence table with no demerit points and a composition fine of $100 (light vehicle) / $150 (heavy vehicle) (SPF, Basic Theory of Driving). Yellow-box obstruction is not a scheduled DIPS offence in the Rules Schedule fetched for this article; the handbook treats “stopping in a yellow box” as a composition-only item.

Coverage debt

  • The handbook’s three situations are illustrated with diagrams in the PDF that are not reproduced here.
  • OneMotoring’s older “Yellow Box = Magic Box” leaflet is not used as the legal source.

Sources