There's Still a Catch to Plans for the World's Largest Undersea Rail Tunnel

The country of Estonia is seeking more details on a plan to build the world's longest undersea rail tunnel between Helsinki and Tallinn.

1 minute read

August 19, 2019, 7:00 AM PDT

By James Brasuell @CasualBrasuell


Finland Rail

Helsinki Central Station | Dmitriy Bryndin / Shutterstock

A Baltic Sea rail tunnel planned to link Helsinki, Finland to Tallinn, Estonia, has his a snag, reports Ott Ummelas. If completed, the tunnel would become the largest undersea tunnel in the world.

"Financing of 15 billion euros ($16.8 billion) was agreed this year for the tunnel to link Finland and Estonia. But the Baltic nation of 1.3 million people wants more details on that funding, the business plan behind the idea and Finland’s role before giving the green light," according to Ummelas.

As for the planning and engineering details of the plan, Ummelas provides the following details: "The tunnel between Helsinki and Tallinn would span more than 100 kilometers (62 miles) and entails construction of at least one artificial island."

And for a bit of trivia that might come in handy someday, here's a detail about how the project idea got its start: "The project was founded by Finnish entrepreneur Peter Vesterbacka, formerly of Rovio Entertainment Oyj, which developed the Angry Birds video game."

Monday, August 12, 2019 in Bloomberg

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Close-up of "Apartment for rent" sign in red text on black background in front of blurred building

Trump Administration Could Effectively End Housing Voucher Program

Federal officials are eyeing major cuts to the Section 8 program that helps millions of low-income households pay rent.

April 21, 2025 - Housing Wire

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 23, 2025 - Diana Ionescu

Ken Jennings stands in front of Snohomish County Community Transit bus.

Ken Jennings Launches Transit Web Series

The Jeopardy champ wants you to ride public transit.

April 20, 2025 - Streetsblog USA

View of Washington state capitol dome in Olympia, Washington at golden hour.

Washington Legislature Passes Rent Increase Cap

A bill that caps rent increases at 7 percent plus inflation is headed to the governor’s desk.

5 hours ago - Washington State Standard

Low view of Glendale Narrows section of Los Angeles River with concrete bottom and cloudy storm sky over head.

From Planning to Action: How LA County Is Rethinking Climate Resilience

Chief Sustainability Officer Rita Kampalath outlines the County’s shift from planning to implementation in its climate resilience efforts, emphasizing cross-departmental coordination, updated recovery strategies, and the need for flexible funding.

6 hours ago - The Planning Report

Grandparents sitting on bench with young girl and boy, girl holding ball and boy holding ukelele.

New Mexico Aging Department Commits to Helping Seniors Age ‘In Place’ and ‘Autonomously’ in New Draft Plan

As New Mexico’s population of seniors continues to grow, the state’s aging department is proposing expanded initiatives to help seniors maintain their autonomy while also supporting family caregivers.

7 hours ago - Source NM