Cliff Avenue and I229 Interchange

• Project value$49,915,020
• Contractor nameT&R Contracting, inc.
• Completion DateJune 25, 2027

Project Update: 10/31/2025

• Paving on I-229 is completed.
• The southbound off-ramp is paved.
• The southbound on-ramp is almost completed.
• The bridge deck over Cliff Avenue has been paved.
• The temporary signal at I-229 and Cliff southbound is currently being installed.
• Permanent traffic signals at 38^th Street and 41^st Street are planned to be installed before winter. 

Commuter Route Information

Current

• Cliff Avenue is now open to traffic. Please continue to use alternate routes if possible.
• Beginning on November 21, the southbound on-ramp will open to southbound right turns only.
• Beginning on November 21, the southbound off-ramp will open to traffic for left and right turns.
• Beginning on November 21, traffic will be shifted to its final winter configuration with southbound traffic on the newly paved section and northbound traffic in the existing northbound lanes. 

Project Milestones

2025 (Before School Session Ends)

1. Install traffic control and detours
2. Shift I-229 southbound traffic to the northbound lanes and bridge, and northbound traffic to the temporary diversion and bridge
3. Remove the existing southbound bridge
4. Removals on 41st Street
5. Removals on Pam Road
6. Close southbound I-229 off-ramp; southbound I-229 on-ramp
7. Construction of the southbound I-229 bridge abutments, piers, and grading
8. Construction of the southbound off-ramp and installation of a pedestrian tunnel
9. Install sanitary sewer on 41st Street
10. Install a water main on 41st Street
11. Install storm sewer on 41st Street

2025 (During/After School Summer Break)

1. Close Cliff Avenue north of the existing northbound I-229 ramps to 38th Street
2. Close the Lincoln High School entrance
3. Install a water main on Cliff Avenue
4. Install a sanitary sewer on Cliff Avenue
5. Install a storm sewer on Cliff Avenue
6. Construct the Lincoln High School entrance and parking lot
7. Install a permanent traffic signal at 38th Street and Cliff Avenue
8. Construct the portion of Cliff Avenue north of 41st Street
9. Install a permanent traffic signal at 41st and Cliff Avenue
10. Southbound I-229 paving
11. Construct sidewalks
12. Construct a bridge and walls
13. Construct a temporary pedestrian access from the existing sidewalk to the trail under the southbound off-ramp
14. Remove the temporary bridge (if the weather allows)
15. Apply winter paving markings on Cliff Avenue

2026

1. Install traffic control and detours
2. Shift I-229 traffic to the southbound lanes and the bridge
3. Remove the northbound I-229 bridge and the temporary bridge (if still in place)
4. Construction of the northbound I-229
5. Construction of the new northbound I-229 bridge
6. Restrict Cliff Avenue to one lane in each direction
7. Install a sanitary sewer
8. Install a water main
9. Install a storm sewer
10. Construct southbound Cliff Avenue
11. Construct portions of the northbound off-ramp
12. Closure of the northbound on-ramp to begin construction of the pedestrian tunnel and retaining wall
13. Shift Cliff Avenue traffic to southbound lanes (one lane in each direction)
14. Construct northbound Cliff Avenue
15. Construct the northbound on-ramp and pedestrian tunnel