400 South Viaduct Trail

Responsive Margin

An image of the 400 South Viaduct bridge with the Salt Lake City skyline and foothills in the background.

April 2025 Update

We’re excited to share that the construction contract has been awarded, and work is planned for spring through fall 2025. The exact timeline and locations will be determined by the contractor and shared with nearby property owners as schedules are finalized.

You’ll find the final design and a comment survey below. Thank you for your input so far—we’ve heard strong support for the project, especially the public art and improved walking and biking connections. Your feedback has helped shape the design and will continue to guide final details as we move into construction later this spring.

Overview

UDOT and Salt Lake City are partnering to build a multi-use trail along the south side of 400 South, from 900 West to 200 West—including the viaduct bridge over the railroad tracks. This corridor is a key east-west connection, and the project will preserve current vehicle capacity while adding a safe, dedicated space for people walking, biking, and rolling. Public art will help reflect the area’s character and make the trail more inviting.

Construction will include sidewalk and pedestrian ramp improvements, new striping, a physical barrier separating the trail from traffic, and minor median adjustments. The trail will connect to bike lanes on 900 West, 300 West, and 200 West, and link to public spaces like Pioneer Park.

Equity and the East/West Divide

Railroad tracks and I-15 actively divide Salt Lake City – physically, racially, economically, and socially – by an East/West axis. This divide is particularly daunting for people traveling by foot or using other forms of active transportation. This particular section of the divide aims to connect the City’s downtown core with the Westside neighborhoods, which are considered among the most racially and ethnically diverse places in all of Utah. Creating a safe and enjoyable multimodal connection across this divide is important to improve transportation equity in the area.

Public Art

The new trail will make it easier to walk or bike through the corridor—and public art will make the journey more vibrant and welcoming. The design will reflect and connect Salt Lake City’s East and West sides while adding color, character, and a sense of safety for trail users.

At the February open house, community input inspired the artists to highlight Poplar Grove’s diversity and natural beauty—including the beloved peafowl. The art will be built into the viaduct fencing, with wave-like patterns that echo the nearby Jordan River. Reflective tape and translucent panels will feature color palettes from across the valley—like the Great Salt Lake’s blues and purples, and the mountain greens and oranges—culminating in a bold “full peacock” on the Poplar Grove side of the viaduct as an entrance to the neighborhood.

See the “Previous Public Events” section for open house boards with more about the art.

A rendering of a colorful piece of art spanning the 400 South bridge.

Project Design

This a draft concept design and could change as work progresses. Please contact the project team with questions.

RDW23043_400 S_Planset_100pct

We Want to Hear from YOU!

We are currently refining details of the 100% design and are not able to make major changes at this point, but we’d like to know if there are details we can add or modify to make the infrastructure work best for you.

Take the survey in a new tab.

Public Engagement to Date

In February, Salt Lake City Transportation and the Arts Council hosted an open house at Neighborhood House (1050 W 500 S), where residents shared input through project boards and conversations. A local focus group also met to share what makes Poplar Grove unique, helping shape the artists’ designs. That evening, the team presented to the Poplar Grove Community Council, where residents voiced strong support for walking and biking routes that avoid train crossings, and highlighted their love for the area’s diversity, nature, and local peafowl.

Throughout the summer and fall, the team met one-on-one with corridor property owners to discuss potential parking impacts. These talks, along with coordination with utilities, shaped the updated design.

In October, an open house at the Hampton Inn (425 S 300 W) and another Council presentation gathered feedback on the refined plans. Attendees expressed continued enthusiasm for the project’s art and improved connectivity, along with some design feedback.

400 S Viaduct Trail Design Boards Open House