Appian Way Overcrossing Emergency Replacement Project

Why is this work needed?

In July 2025, Caltrans' Structures Maintenance and Investigations team identified corrosion on the steel columns supporting the Appian Way Overcrossing abutment during a routine bridge inspection. To protect the traveling public, Caltrans temporarily closed the bridge and installed temporary support while engineers developed a permanent solution.

Since then, Caltrans has continued to maintain temporary support while continuing to develop a long-term solution. Caltrans determined that the best path forward is to replace the northern portion of the southbound Appian Way Overcrossing with a wider, more robust structure. To complete this work safely, extended traffic changes and bridge closures are required.

Caltrans has scheduled a long-term full closure of the southbound Appian Way Overcrossing through spring 2027, weather permitting.

Long-Term Southbound Bridge Closure

A long-term full closure of the southbound Appian Way Overcrossing is scheduled to begin Monday, November 16, 2026, at 4 a.m., weather permitting. During construction, the northbound bridge will operate with one lane in each direction to maintain access across the overcrossing.

Traffic Impacts

• Southbound Appian Way Overcrossing will remain closed during construction.
• Northbound Appian Way will operate as two-way traffic, with one lane in each direction.
• RIGHT TURN ONLY onto Appian Way from I-80
• The left-turn lane from northbound Appian Way to the westbound I-80 on-ramp will be closed.
• Motorists should expect traffic delays, temporary traffic control, and periodic lane restrictions in the area.

55-Hour Full Weekend Closure

Prior to the long-term closure, Caltrans will implement a full weekend closure of both the northbound and southbound Appian Way Overcrossing beginning 9 p.m. Friday, November 13, 2026, through approximately 4 a.m. Monday, November 16, 2026.

Traffic Impacts

• Full closure of Northbouth and Southbound Appian Way Overcrossing
• All NB and SB Appian Way traffic will be diverted on to I-80
• All off ramps to Appian Way from I-80 will be closed
• Pedestrian and bicycle access will be prohibited

Detours

SB Appian Way to EB I-80

1. Take WB I-80 on ramp from Appian Way
2. Exit WB I-80 off ramp to Richmond Pkwy/Fitzgerald Dr
3. Turn left onto Richmond Pkwy/Fitzgerald Dr
4. Take the EB I-80 on ramp from Richmond Pkwy/Fitzgerald Dr

NB Appian Way to WB I-80:

1. Take EB I-80 on ramp from Appian Way
2. Exit EB I-80 to Pinole Valley Rd
3. Turn left onto Pinole Valley Rd
4. Take the WB I-80 on ramp from Pinole Valley Rd

WB I-80 to SB Appian Way:

1. Exit WB I-80 off ramp to Richmond Pkwy/Fitzgerald Dr
2. Turn left onto Richmond Pkwy/Fitzgerald Dr
3. Continue on Fitzgerald Dr
4. Turn right onto SB Appian Way

EB I-80 to NB Appian Way:

1. Exit EB I-80 to Pinole Valley Rd
2. Turn left onto Pinole Valley Rd
3. Turn left onto San Pablo Ave from Pinole Valley Rd
4. Turn left onto NB Appian Way

For more information

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Project Contact

DeNise Harding
Contra Costa Public Information Officer
Email: denise.harding@dot.ca.gov
Phone: (279) 234-2175