Road narrowingIndonesia

An introduction to the traffic rules and road signs of Indonesia. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.


1. Road narrowing

A road narrowing is a section where the available width of the road or carriageway becomes smaller. The narrowing may occur on both sides, on one side only, or because one or more traffic lanes end.

Drivers should reduce speed, observe approaching and adjacent traffic, maintain sufficient lateral clearance and merge when necessary. Warning signs do not always determine priority, so drivers must follow any priority signs, lane markings and local traffic rules.

What does a road-narrowing warning mean in Indonesia?

Indonesian traffic-sign rules provide warnings of road narrowing. Read the indicated shape, road markings and any separate traffic control rather than using the warning as permission to force a passage.

🔗 peraturan.bpk.go.id • Indonesia — Act Articles 103–106, 108–121: actual controls, safe speed and lawful manoeuvres

🔗 peraturan.bpk.go.id • BPK — Law 6/2023, Article 55, amendments to Act 22/2009

🔗 peraturan.bpk.go.id • PM 13/2014 — full national traffic-sign regulation and illustrated annexes

🔗 peraturan.bpk.go.id • BPK — current PM 13/2014 status and repeal of old KM 61/1993

Does a narrowing warning give you priority in Indonesia?

No. A warning describes the reduced width, rather than allocating priority or setting a numerical speed limit. Follow any separate priority signs, signals and meeting rules, and slow enough to pass safely or wait before entering.

🔗 peraturan.bpk.go.id • Indonesia — Act Articles 103–106, 108–121: actual controls, safe speed and lawful manoeuvres

🔗 peraturan.bpk.go.id • BPK — Law 6/2023, Article 55, amendments to Act 22/2009

🔗 peraturan.bpk.go.id • PM 13/2014 — full national traffic-sign regulation and illustrated annexes

🔗 peraturan.bpk.go.id • BPK — current PM 13/2014 status and repeal of old KM 61/1993

What should you do if traffic lanes merge at a narrowing in Indonesia?

Read the lane-ending signs and markings, check surrounding traffic and signal any lane change as required. Apply the local merging rule and enter only when safe. Do not assume the driver in an ending lane always has priority, or confuse merging with meeting oncoming traffic.

🔗 peraturan.bpk.go.id • Indonesia — Act Articles 103–106, 108–121: actual controls, safe speed and lawful manoeuvres

🔗 peraturan.bpk.go.id • BPK — Law 6/2023, Article 55, amendments to Act 22/2009

🔗 peraturan.bpk.go.id • PM 13/2014 — full national traffic-sign regulation and illustrated annexes

🔗 peraturan.bpk.go.id • BPK — current PM 13/2014 status and repeal of old KM 61/1993