Chennai’s Outer Ring Road is finished and open. The much larger Chennai Peripheral Ring Road (CPRR) is still being built in pieces. When complete, it will run about 133 km in a wide arc from Ennore port in the north to Poonjeri near Mamallapuram on ECR. It is meant to give lorries going to the ports and the industrial belts around Sriperumbudur and Oragadam a route that does not pass through the city.
The southernmost leg went out to tender in late 2025, a middle section has been under construction since 2025, and one section is still at the planning stage. Here is where each part stands and what it changes for commuters and freight.
Outer Ring Road: already in use
The Outer Ring Road runs in an arc from GST Road near Vandalur, across the Bengaluru highway (NH 48) near Nazarethpettai and the Tiruvallur and Kolkata highways further north, to the Minjur area. It was built in two phases and is open along its length. It is the road most people mean today when they say “the ring road”.
For commuters, ORR now connects with the metro too. The new Poonamallee Bypass station on the Yellow Line, which opened on 11 October 2026, sits beside the ORR interchange near Nazarethpettai. Someone living along ORR can park and ride into Porur and Vadapalani. CMRL’s diversion page lists the “Outer Ring Road Clover Leaf” among the Corridor 4 work sites.
ORR stays busy with heavy vehicles at all hours. Two-wheeler riders should take extra care at night.
Peripheral Ring Road: the five sections
| Section | Status in latest reports |
|---|---|
| I: Ennore port to Thatchur | Reported completed in a 2025 state account; link-road works near the Kosasthalaiyar continued into late 2025 |
| II: Thatchur to Tiruvallur bypass | Reported completed in the same account |
| III: Tiruvallur bypass to Sriperumbudur (30.10 km) | Construction launched May 2025, Rs 2,689.74 crore |
| IV: Sriperumbudur to Singaperumal Koil | Detailed project report under preparation (as of May 2025) |
| V: Singaperumal Koil to Poonjeri, ECR (27.34 km) | Bids floated in four packages, November 2025 |
Section III is a six-lane road with service lanes on both sides, two flyovers and a railway bridge. Work on it was formally started in May 2025, and the State Highways Department is executing it, DT Next reported. That report also stated that the first two sections in the north were complete. Near Ennore, the Highways Department has built a bridge over the Kosasthalaiyar at Velamaram Paadu and a 2.8 km link road from the Northern Port Access Road. Fishers complained in December 2025 that earth dumped for the works had not been cleared from the river, DT Next reported.
Section V is designed as a 10-lane access-controlled expressway, with six main lanes and a two-lane service road on each side. It includes a 1.8 km elevated stretch across Perumal Eri to join the ECR interchange approach. TNRDC floated bids for it in four packages in November 2025, DT Next reported. No completion date was given.
Japan’s JICA is a lender. A loan of 49,847 million yen, about Rs 2,809 crore, for the project’s second phase was announced in February 2024, after a first-phase loan signed in 2018, DT Next reported.
What it changes for freight
Today, a container lorry from Ennore or Kattupalli port going to the Sriperumbudur car and electronics factories has to use the Ennore Expressway, the Inner Ring Road or ORR, and city roads with entry-time limits. The peripheral road gives these trucks a route well outside the metropolitan core, linking Ennore, Thiruvallur, Sriperumbudur, Singaperumal Koil on GST Road and ECR.
Warehousing firms are already building along it. Prologis is developing a 51-acre logistics site at Redhills on the CPRR corridor. Its India head said the road is “taking shape” and will make the location important for regional distribution, DT Next reported in March 2026.
What it changes for commuters
- Fewer trucks inside the city once the full ring is open, mainly on Poonamallee High Road, GST Road through Tambaram and the Inner Ring Road.
- New links between suburbs such as Thiruvallur, Sriperumbudur and Singaperumal Koil without going through Chennai.
- Disruption while it is built around Tiruvallur bypass and Sriperumbudur in Section III, and later along the Singaperumal Koil to ECR stretch.
- Land and property: when an ad mentions “near the ring road”, check which section is meant and whether it is built, tendered or still being planned.
Ring roads and bypasses come under the projects wing of the Highways and Minor Ports Department, which is the place to check for official updates.
Quick answers
How long is the Chennai Peripheral Ring Road?
About 133 km, from Ennore port to Poonjeri on ECR, in five sections.
Is the Chennai Peripheral Ring Road complete?
No. The northern sections are reported done. The Tiruvallur to Sriperumbudur section is under construction, and the last two southern sections are at the project report and tender stages.
Is the Outer Ring Road the same as the Peripheral Ring Road?
No. The ORR from Vandalur to Minjur is already open. The CPRR is a separate, wider ring further out.
Information checked against official sources on 18 October 2026. Fees, dates and rules can change; confirm on the linked official pages before acting.
Sources
- Highways and Minor Ports Department, Government of Tamil Nadu
- Road Diversion (CMRL)
- Dy CM inaugurates Chennai Peripheral Ring Road Phase III construction (DT Next, May 2025)
- TNRDC floats bids for final 27.34-km stretch of Chennai peripheral ring road (DT Next, Nov 2025)
- Chennai: Soil dumping endangers fishers at Kosasthalaiyar (DT Next, Dec 2025)
- TN garners Rs 2,809 cr of Japan’s Rs 12,800 cr India investment (DT Next, Feb 2024)
- Prologis begins development projects worth Rs 3,300 crore (DT Next, Mar 2026)
