A Guide to the Nairobi Expressway: Tolls, Rules, and Transit Times

For decades, the journey from Jomo Kenyatta International Airport (JKIA) to Nairobi’s city center and the western suburbs of Westlands, Kilimani, and Lavington was defined by one frustrating reality: Mombasa Road traffic. Travelers arriving from long international flights were regularly greeted by multi-hour gridlocks at key roundabouts like Nyayo Stadium, Bunyala, and Westlands.

That changed dramatically with the opening of the Nairobi Expressway. Spanning 27 kilometers from Mlolongo to James Gichuru Road in Westlands, this elevated class-A toll highway has redefined transit times, business travel, and airport transfers in the Kenyan capital. For visitors, business travelers, and residents, understanding how the Expressway works—from toll payments to speed limits and entry points—is essential for smooth navigation.

What is the Nairobi Expressway?

Built and managed by the Moja Expressway Company under a public-private partnership, the Nairobi Expressway is a four-lane and six-lane dual carriage highway. It runs above the existing Mombasa Road (A109), Uhuru Highway, and Waiyaki Way (A104). It acts as a bypass over the congested lower-level streets, featuring 15 entry and exit plazas strategically positioned to connect key commercial, industrial, and residential zones.

Key Plaza Locations

• Mlolongo / Syokimau: Serving the industrial zones, residential neighborhoods of Athi River/Kitengela, and the SGR Nairobi Terminus.
• JKIA: Directly linked to the airport terminal loop, allowing immediate access to the Expressway upon landing.
• Eastern Bypass / Southern Bypass: Crucial connections for drivers bypassing the city center toward Karen, Lang'ata, or Ruiru.
• Capital Centre / Haile Selassie: Direct exits for the Nairobi Central Business District (CBD) and industrial areas.
• Museum Hill / Westlands / James Gichuru: Connecting to the commercial hub of Westlands, Gigiri (via the Red Link Road), and the western highway toward Naivasha.

Transit Times: Expressway vs. Lower Road

The primary benefit of the Nairobi Expressway is time saved. Below is a comparative look at transit times during typical weekday morning and evening peak hours.

Understanding the Toll Rates and Vehicle Classes

Toll rates on the Expressway are not flat; they are calculated based on the distance traveled between your entry and exit points, as well as the classification of your vehicle.

Vehicle Classifications

1. Class 1 (Light Vehicles): Saloon cars, hatchbacks (like Vitz or Demio), and light SUVs/Crossovers (like RAV4, CX-5, or Toyota Land Cruiser Prado). This class accounts for the majority of passenger vehicles. 2. Class 2 (Medium Vehicles): Light trucks and minibuses (including safari custom 4x4 vans and commercial trucks with two axles). Toll rates are approximately 1.5 times the Class 1 rate. 3. Class 3 (Heavy Vehicles): Large buses and heavy trucks with three axles. Toll rates are approximately 3 times the Class 1 rate. 4. Class 4 (Very Heavy Vehicles): Large multi-axle trailers. Toll rates are approximately 4 times the Class 1 rate.

Estimated Toll Rates (Class 1 Vehicles)

Note: Toll rates are subject to adjustments based on the exchange rate between the Kenyan Shilling (KES) and the US Dollar (USD).

• JKIA to Westlands: ~KES 360 - KES 500
• Mlolongo to James Gichuru (Full Length): ~KES 430 - KES 600
• Museum Hill to Westlands: ~KES 120 - KES 180

Payment Methods: ETC vs. MTC vs. Smart Card

Choosing how you pay determines how quickly you can exit the Expressway. The toll plazas are divided into dedicated lanes based on the payment method.

1. Electronic Toll Collection (ETC) — Recommended

The ETC system uses a Radio Frequency Identification (RFID) microchip—known as an On-Board Unit (OBU)—installed on your vehicle’s windshield.

• How it works: As you approach the toll barrier, sensors scan the OBU, deduct the toll fee from your account balance, and open the gate automatically. You do not need to stop or open your window.
• How to register: Visit the Moja Expressway service centers at the Westlands plaza or the Cabanas office on Mombasa Road. You will need to present your vehicle registration logbook, ID/Passport, and pay a registration fee. You can top up your toll account using M-Pesa or credit card.
• Pros: Zero waiting time at plazas, dedicated fast-pass lanes, and a points-based discount structure.

2. Manual Toll Collection (MTC)

The MTC system relies on a physical card handed to you by a toll attendant when you enter.

• How it works: You stop at the entrance plaza, pull a card, and drive. When exiting, you hand the card to the attendant and pay using cash or M-Pesa.
• Pros: Convenient for one-off users who do not have an OBU installed.
• Cons: Often experiences long queues, especially at the Westlands and JKIA exits. M-Pesa payments can take time to process, causing delays.

3. Smart Card (Lipa Smart)

A prepaid tap-and-go card that you pre-load with credit.

• How it works: You tap the card at the reader upon entry and tap again at exit.
• Pros: Faster than cash/M-Pesa manual processing.
• Cons: Still requires you to stop and roll down your window.

Crucial Expressway Rules and Traffic Violations

The Nairobi Expressway is managed with strict regulations to maintain high speeds and safety. Traffic police and Moja security patrol the highway constantly, using automated speed cameras and CCTV.

1. Speed Limits

• Maximum Speed: 100 km/h for Class 1 and Class 2 vehicles.
• Minimum Speed: 80 km/h (to prevent slow-moving vehicles from creating hazards).
• Exits and Plaza Approaches: Speed limits drop to 30 km/h or 20 km/h as you approach the toll lanes.

2. Prohibited Vehicles

The following are strictly banned from using the Nairobi Expressway:

• Pedestrians and cyclists.
• Motorcycles with an engine capacity below 400cc.

Three-wheeled vehicles (tuk-tuks*) and handcarts.

• Vehicles carrying hazardous or oversized cargo.

3. Fines and Penalties

Penalties on the Expressway are high and strictly enforced:

• Over-speeding: Captured by automatic speed cameras. Fines start at KES 10,000.
• Damaging Expressway Infrastructure: If you crash into a guardrail, toll barrier, or concrete wall, you will be billed for the repairs. Fines for damaging a toll booth can exceed KES 1.5 million.
• U-Turns and Reversing: Strictly illegal. If you miss your exit, you must proceed to the next exit, pay the toll, exit, re-enter, and drive back.
• Littering: Throwing trash out of your vehicle attracts a heavy fine.