Structure 7966 · Oakland County, MI

I-696 over I-75 & 4 Ramps

Carries I-696 over I-75 & 4 Ramps, In Royal Oak.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT670 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

670 ft end to end, longest span 160 ft: about 1.9 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built197155 years old
Length669.9 ft204.2 m
Daily traffic209,200counted 2007
Last inspectedJuly 2024every 24 months

Location

StateMichigan
CountyOakland
LocationIn Royal Oak
CarriesI-696
CrossesI-75 & 4 Ramps
Coordinates42.47653, -83.11139

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length669.9 ft (204.2 m)
Max Span160.1 ft (48.8 m)
Deck Width152.6 ft (46.5 m)
Deck Area9495.3 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic209,200 (2007)
Truck Traffic4%
Lanes On Bridge8
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007966

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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