US Bridges

SH 121 NB Ramp over Parkwood Boulevard

Good

Collin County, Texas · 0.5 MI NE of Dnt · Structure no. 180430036404707

Built
2021
4 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
350 ft
3 main spans
Daily traffic
20,206
2019 count
Owner
Toll Authority
Local Toll Authority

About this bridge

SH 121 NB Ramp over Parkwood Boulevard is a prestressed concrete stringer/multi-beam or girder carrying SH 121 NB Ramp over Parkwood Boulevard in Collin County, Texas. It was built in 2021, so it is 4 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20,206 vehicles a day, roughly 4% of them trucks, projected to reach 28,288 by 2040. The structure is 350 ft (106.7 m) long and 38 ft wide.

Location

Open in Google Maps
CarriesSH 121 NB Ramp
CrossesParkwood Boulevard
Location0.5 MI NE of Dnt
CountyCollin County
StateTexas
Coordinates33.09161, -96.81974
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length350 ft (106.7 m)
Longest span120 ft (36.6 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,206 (2019)
Projected traffic28,288 by 2040
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 121 NB Ramp over Parkwood Boulevard built?

It was built in 2021, making it 4 years old in 2025.

What condition is SH 121 NB Ramp over Parkwood Boulevard in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does SH 121 NB Ramp over Parkwood Boulevard carry?

About 20,206 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is SH 121 NB Ramp over Parkwood Boulevard?

The structure is 350 ft (106.7 m) long with a longest span of 120 ft (36.6 m) and a deck 38 ft wide.

Who owns SH 121 NB Ramp over Parkwood Boulevard?

It is owned by the Local Toll Authority.