SH 121 SB / Ss 399 over Medical Center DR
Good Condition15 years old19,785 vehicles/day
Location
| State | Texas |
| County | Collin |
| Location | 0.6 Mi East Of US 75 |
| Carries | SH 121 SB / Ss 399 |
| Crosses | Medical Center DR |
| Coordinates | 33.16271, -96.63628 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 276.9 ft (84.4 m) |
| Max Span | 97.1 ft (29.6 m) |
| Deck Width | 60.0 ft (18.3 m) |
| Deck Area | 1544.5 sq m |
| Main Spans | 3 |
| Year Built | 2011 |
Traffic
| Avg Daily Traffic | 19,785 (2020) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 8 |
Inspection & Ownership
| Last Inspection | December 2023 |
| Inspection Frequency | Every 24 months |
| Owner | Local Toll Authority |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 180430036404459 |