Where Kedah’s Traffic Actually Concentrates: The State’s Busiest Roads and Junctions

Kedah’s road network carries three distinct kinds of traffic: long-distance expressway movement, town-level commuting, and cross-border flow to Thailand. Each concentrates in a different place.

How Traffic Volume in Kedah Is Measured

Malaysia’s national traffic census is collected by state Public Works Departments and published by the Ministry of Works as Road Traffic Volume Malaysia, the reference every planner and media owner works from.

What the Census Covers

Counts are taken at fixed census stations along federal roads and recorded hourly in both directions. There are 554 stations nationwide, with Kedah’s own set mapped by district.

Kedah’s recorded annual traffic growth rate was 1.81 per cent in the 2017 census, a figure used as the projection basis for road expansion planning across the state.

What It Does Not Capture

• State and municipal roads outside the federal census network
• Seasonal spikes around Aidilfitri, school holidays and long weekends
• Pedestrian volume in town centres and around markets
• Cross-border movement, which is counted separately by Immigration
• New developments that shift local patterns faster than the census cycle

The North-South Expressway: Kedah’s Highest-Volume Corridor

The North-South Expressway runs the full length of the state, from Bukit Kayu Hitam in the north through Jitra, Alor Setar, Gurun and Sungai Petani before crossing into Penang and Perak.

It is the single highest-volume road in Kedah by a wide margin. The expressway spans 748 kilometres nationally, linking the northern states to the Klang Valley and the south.

Gurun to Sungai Petani

This stretch appears in traffic bulletins more often than any other Kedah section. Operators regularly report slow movement southbound between Gurun and Sungai Petani during peak return periods.

The Jitra and Hutan Kampung Approach

The Hutan Kampung toll plaza from the Jitra direction is another recurring congestion point, particularly during festive returns when northbound and southbound flows peak together.

• Highest sustained volume of any Kedah corridor
• Peaks sharply around Aidilfitri, year-end holidays and school breaks
• Carries a heavy proportion of commercial and long-haul vehicles
• Interchange approaches at Gurun, Sungai Petani and Alor Setar concentrate the flow
• Traffic slows predictably at toll plazas rather than on open stretches

Why the Expressway Is Not Automatically the Best Buy

Volume on the expressway is high but the traffic is moving fast and passing through. Much of it has no relationship with the towns it drives past.

Federal Route 1: The Trunk Road That Still Carries the Towns

Federal Route 1 runs parallel to the expressway for most of its length through Kedah. Where the expressway carries through traffic, FT1 carries the traffic that actually stops in town.

That distinction matters for anyone placing advertising. Expressway volume is higher, but FT1 delivers the audience that lives, shops and works in Alor Setar, Gurun, Bedong and Sungai Petani.

Why FT1 Punches Above Its Count

• Passes directly through the commercial centre of every major Kedah town
• Traffic moves slowly through signalised junctions, extending dwell time
• Serves local commuting, school runs and retail trips rather than transit
• Feeds into the expressway at each interchange, so both networks share users
• Free of tolls, which pushes price-sensitive local traffic onto it

Bedong and Kota Sarang Semut sit on this route between Alor Setar and Sungai Petani, carrying steady inter-town movement that never touches the expressway at all.

Bukit Kayu Hitam: The Busiest Land Border in the North

The Bukit Kayu Hitam crossing into Sadao is the principal highway gateway between Malaysia and Thailand on the peninsula’s west coast, sitting on Asian Highway 2.

Volume here is driven by weekend and holiday shopping and dining trips into Hat Yai and Danok, plus a constant stream of commercial freight in both directions.

The Numbers Move in Waves

Immigration figures show how sharply border volume spikes. During one school holiday period, 30,754 travellers were recorded entering and exiting the Bukit Kayu Hitam complex.

The smaller Kota Putra crossing near Kuala Nerang normally handles 400 to 600 visitors a day, but recorded 1,868 during the same holiday surge, close to a fortyfold difference in scale from the main gate.

The New Sadao Link

A new road connecting the Bukit Kayu Hitam complex directly to the Sadao facility opened in July 2026, built to separate heavy vehicles from passenger traffic on the approach.

• Light vehicles clear the complex between 6am and midnight
• Cargo lanes have operated on extended hours since a 2019 trial
• Weekend and school holiday queues extend well back down the approach road
• Duty-free retail between the two checkpoints generates its own stopping traffic
• Freight and passenger flows previously shared one route, which drove the congestion

Planning Around the Waves

Border traffic is the least consistent volume in the state. A site here delivers exceptional reach during holiday periods and considerably less on an ordinary midweek day.

Alor Setar: The State Capital’s Junction Network

Alor Setar’s traffic is organised around one bypass and several arterial junctions. The Sultanah Bahiyah Highway, Federal Route 255, runs 13.84 kilometres around the city.

Where the Roads Converge

The bypass connects the expressway to Federal Route 1, Federal Route 7 towards Kangar, and Federal Route 78 towards Kuala Kedah and the Langkawi ferry terminal.

That convergence makes the Alor Setar North and Alor Setar South interchanges the two highest-value junction positions in the city, since almost every through movement passes one of them.

The FT7 Upgrade

Federal Route 7 between Kangar and Alor Setar underwent staged closures for reconstruction work running from January to May 2026, with traffic diverted through Jalan Alor Janggus and Jalan Gunung Keriang.

• Alor Setar North interchange — expressway to city and Kangar movements
• Alor Setar South interchange — expressway to Sungai Petani and city centre
• Simpang Kuala — junction of the Kuala Kedah and Alor Mengkudu routes
• Jalan Sultanah junction — where the bypass meets Darul Aman Highway
• The airport approach at Lapangan Terbang Sultan Abdul Halim

Roadworks of that scale redistribute traffic for months at a time, which is worth checking before committing to any long booking on an affected corridor.

Sungai Petani and Kulim: The Industrial Belt

Kedah’s southern districts generate the state’s densest commuting traffic. Sungai Petani is the largest town by population, and Kulim adds a substantial industrial workforce.

Federal Route 136 and the Kulim Corridor

Federal Route 136 runs 81.44 kilometres from Kuala Ketil through Padang Serai, Lunas and Kulim before crossing into Perak at Parit Buntar, linking the industrial areas to Penang.

The Butterworth–Kulim Expressway carries the cross-state commute into Penang, which makes the Kulim approaches busiest in the early morning and late afternoon rather than at weekends.

• Weekday commuter peaks are sharper here than anywhere else in Kedah
• Traffic direction is strongly asymmetric, heavy towards Penang in the morning
• Amanjaya draws retail traffic through Sungai Petani’s northern approaches
• Hospital, police and school junctions concentrate local movement all day
• Industrial shift patterns create secondary peaks outside normal rush hours

Hospital and Institutional Junctions

Hospital roundabouts and junctions in Jitra, Kulim and Sungai Petani generate constant all-day movement rather than sharp peaks, which suits messaging that needs sustained frequency.

Secondary Corridors Worth Knowing

Beyond the main spine, several routes carry meaningful volume without appearing in national traffic reporting. They matter for regional campaigns targeting specific districts.

• Federal Route 4 — the east-west route through Kuala Nerang towards Kelantan
• Trans Eastern Kedah Interland Highway — 74.5 kilometres from Durian Burung to Kupang
• Federal Route 67 — connects Sungai Petani, Kuala Ketil and Baling
• The Pendang toll access route and its junction with the local network
• Yan and the coastal road serving the Gunung Jerai foothills
• Jitra town approaches, feeding both the border route and the Perlis corridor

Reading Traffic Volume for Site Selection

Raw vehicle counts are the starting point, not the answer. A high count on a fast-moving expressway stretch can deliver less advertising value than a lower count at a signalised junction.

What Actually Determines Value

• Dwell time at the site, which is highest at traffic lights and toll approaches
• Approach distance and sightline, which determine how long the message is readable
• Direction of travel relative to the audience’s purpose, whether commuting or shopping
• Consistency across the week, since border and expressway sites peak unevenly
• Surrounding land use, which shapes who is actually in those vehicles

The strongest positions in Kedah tend to be junction sites on the trunk network rather than open expressway frontage, because slow-moving traffic reads a board that fast-moving traffic passes.

Where a campaign needs statewide coverage, the practical structure is a spine along the Alor Setar and Sungai Petani corridor, supported by district junction sites in Jitra, Kulim, Pendang and Yan.

Traffic estimates quoted by site owners are usually drawn from the federal census or from local counts, so always ask which basis applies and whether the figure is per day or per month before comparing sites.