--- title: Dallas North Tollway (DNT) Improvements Segment 1 | HVJ Associates description: See how we've provided asphaltic concrete testing, asphaltic concrete placement inspection and other materials and testing engineering services. --- [![HVJ Logo](https://www.hvj.com/hs-fs/hubfs/HVJ%20logo_141x71.png?width=110&height=71&name=HVJ%20logo_141x71.png "HVJ Logo")](https://www.hvj.com/?hsLang=en) ** [ Let's talk ](https://www.hvj.com/contact-us?hsLang=en) ** ** Geotechnical Engineering Soil, rock, and groundwater conditions at every site are different. We assess the specific site conditions and design earth structures (slopes, channels, and dikes), foundations (retaining walls, bridges, buildings, tanks), and subsurface structures (clarifiers, lift stations, buried utilities, tunnels) to economically achieve the specific project objectives. Learn More → Construction Materials Engineering & Testing Construction material performance is key to the function and durability of any project. We engineer and test materials such as soil, concrete, and asphalt so you get what you pay for and the project performs as expected.     Learn More → Civil/Pavement Engineering A successful project starts with clear understanding of the project’s specific needs. We prepared street rehabilitation PS&E, traffic control designs, pavement designs, and asset management systems based on careful understanding of design requirements.   Learn More → Environmental Geology & Engineering Impact from hazardous waste, wetlands, faulting, and/or NEPA processes are serious concerns for project development. We identify such concerns early in project development, and provide strategies to mitigate impacts and provide the proper regulatory approval so the project can proceed on time and achieve the project goals. Learn More → Roads & Bridges Congestion and failing road surfaces cause delays, vehicle damage, and even driver safety issues. Solving these problems requires our specialized knowledge of pavement and roadway structures. Learn More → Water, Wastewater & Flood Control Drinking water, flushing toilets, and dry streets for granted – until they are gone. We specialize in keeping these systems running effectively. Learn More → Airports, Ports & Dredging Expanding and maintaining ports and airports is crucial to our economic development. HVJ’s specialized pavement, wharf, and navigation channel experience makes it happen. Learn More → Rail & Transit Rail and public transit facilities enable efficient transportation of people and goods. Our detailed knowledge of AREMA requirements keeps projects on track. Learn More → Buildings & Parks Schools, universities, courts, parks, solid waste facilities are all critical to our society. HVJ has specialized knowledge and experience with a multitude of public projects. Learn More → [About Us](https://go.hvj.com/about-us?hsLang=en) [News & Resources](https://www.hvj.com/blog?hsLang=en) [Locations](https://www.hvj.com/all-locations?hsLang=en) [Partners](https://www.hvj.com/partners?hsLang=en) HVJ Difference Our engineers provide a unique blend of capabilities and experience because of the support they receive. Employees do not simply exist here. They thrive. Learn More → Culture We are committed learners, empowered to interact based on making strong commitments. We take ownership of our actions and results. Learn More → Benefits We believe in taking care of our employees. We offer a rewarding work experience, opportunities for advancement and competitive benefits. Learn More → Employee Stories Check out what our employees say and learn about the HVJ experience! Great people and even greater teams are behind every project. Learn More → Current Openings We're always looking for talented individuals who fit our culture and can bring new perspectives and experiences to our growing teams. Learn More → The Opportunity Own a successful engineering business by adding our proven systems to your engineering talent and network. Learn More → How It Works Help us branchise – you help us build a branch office and then convert it into your own franchise. Learn More → Who's A Fit? Are you energetic and confident? See if this might be an opportunity that fits you. Learn More → FAQs What do you want to know?  Find the answers to common questions. Learn More → Success Stories Hear about the outstanding results our current franchisees have produced using our proven systems. Learn More → [![HVJ Logo](https://www.hvj.com/hs-fs/hubfs/HVJ%20logo_141x71.png?width=110&height=71&name=HVJ%20logo_141x71.png "HVJ Logo")](https://www.hvj.com/?hsLang=en) ** [ Let's talk ](https://www.hvj.com/contact-us?hsLang=en) ** ** Geotechnical Engineering Soil, rock, and groundwater conditions at every site are different. We assess the specific site conditions and design earth structures (slopes, channels, and dikes), foundations (retaining walls, bridges, buildings, tanks), and subsurface structures (clarifiers, lift stations, buried utilities, tunnels) to economically achieve the specific project objectives. Learn More → Construction Materials Engineering & Testing Construction material performance is key to the function and durability of any project. We engineer and test materials such as soil, concrete, and asphalt so you get what you pay for and the project performs as expected.     Learn More → Civil/Pavement Engineering A successful project starts with clear understanding of the project’s specific needs. We prepared street rehabilitation PS&E, traffic control designs, pavement designs, and asset management systems based on careful understanding of design requirements.   Learn More → Environmental Geology & Engineering Impact from hazardous waste, wetlands, faulting, and/or NEPA processes are serious concerns for project development. We identify such concerns early in project development, and provide strategies to mitigate impacts and provide the proper regulatory approval so the project can proceed on time and achieve the project goals. Learn More → Roads & Bridges Congestion and failing road surfaces cause delays, vehicle damage, and even driver safety issues. Solving these problems requires our specialized knowledge of pavement and roadway structures. Learn More → Water, Wastewater & Flood Control Drinking water, flushing toilets, and dry streets for granted – until they are gone. We specialize in keeping these systems running effectively. Learn More → Airports, Ports & Dredging Expanding and maintaining ports and airports is crucial to our economic development. HVJ’s specialized pavement, wharf, and navigation channel experience makes it happen. Learn More → Rail & Transit Rail and public transit facilities enable efficient transportation of people and goods. Our detailed knowledge of AREMA requirements keeps projects on track. Learn More → Buildings & Parks Schools, universities, courts, parks, solid waste facilities are all critical to our society. HVJ has specialized knowledge and experience with a multitude of public projects. Learn More → [About Us](https://go.hvj.com/about-us?hsLang=en) [News & Resources](https://www.hvj.com/blog?hsLang=en) [Locations](https://www.hvj.com/all-locations?hsLang=en) [Partners](https://www.hvj.com/partners?hsLang=en) HVJ Difference Our engineers provide a unique blend of capabilities and experience because of the support they receive. Employees do not simply exist here. They thrive. Learn More → Culture We are committed learners, empowered to interact based on making strong commitments. We take ownership of our actions and results. Learn More → Benefits We believe in taking care of our employees. We offer a rewarding work experience, opportunities for advancement and competitive benefits. Learn More → Employee Stories Check out what our employees say and learn about the HVJ experience! Great people and even greater teams are behind every project. Learn More → Current Openings We're always looking for talented individuals who fit our culture and can bring new perspectives and experiences to our growing teams. Learn More → Agencies HVJ has been proud to support hundreds of public agencies meet and exceed service expectations from their constituents.  Learn More → Consultant Clients We’ve developed ongoing teaming relationships with many consulting firms based on delivering outstanding client satisfaction. Learn More → Providers Our success strongly depends on our business associates that provide the products and services we need. Learn More → HVJ Difference Our engineers provide a unique blend of capabilities and experience because of the support they receive. Employees do not simply exist here. They thrive. Learn More → Culture We are committed learners, empowered to interact based on making strong commitments. We take ownership of our actions and results. Learn More → Benefits We believe in taking care of our employees. We offer a rewarding work experience, opportunities for advancement and competitive benefits. Learn More → Employee Stories Check out what our employees say and learn about the HVJ experience! Great people and even greater teams are behind every project. Learn More → Current Openings We're always looking for talented individuals who fit our culture and can bring new perspectives and experiences to our growing teams. Learn More → The Opportunity Own a successful engineering business by adding our proven systems to your engineering talent and network. Learn More → How It Works Help us branchise – you help us build a branch office and then convert it into your own franchise. Learn More → Who's A Fit? Are you energetic and confident? See if this might be an opportunity that fits you. Learn More → FAQs What do you want to know?  Find the answers to common questions. Learn More → Success Stories Hear about the outstanding results our current franchisees have produced using our proven systems. Learn More → Search **Menu** ** ** [![Let's Talk](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/5496911/6233d0db-c76c-4678-9152-08331c17b6f1.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/5496911/6233d0db-c76c-4678-9152-08331c17b6f1) ![Dallas North Tollway Improvements Image](https://www.hvj.com/hs-fs/hubfs/FLIR0365.jpg?width=2048&name=FLIR0365.jpg "Dallas North Tollway Improvements Image") # Effecient Staffing, Proactive Planning for Peak Work Loads Saves Money ## Project Background **Dallas North Tollway (DNT) Improvement Segment 1** The Dallas North Tollway (DNT) Improvements Project Segment 1 extended from Harvest Hill Road to Interstate 35E. This $2.7M, 18-month project required removal of the existing median concrete traffic barrier and replacing it with a single slope concrete barrier. Work included resurfacing the roadway pavement with an ultra-thin bonded Hot Mix wearing course, fog sealing existing raised asphalt shoulders, and full-depth pavement repair, and restriping all lanes. ### **Practice:** Construction Materials Engineering and Testing ### **Sector:** Roadway ### **Location:** Dallas, Texas ### **Services:** Asphaltic Concrete Testing, Portland Cement Concrete Testing, Asphaltic Concrete Placement Inspection ![Dallas North Tollway Project](https://www.hvj.com/hs-fs/hubfs/FLIR0389.jpg?width=2048&name=FLIR0389.jpg "Dallas North Tollway Project") ## The Problem The project needed highly proficient staff specialized in various types of construction, including thin bonded overlays, with a tight budget. ## The Goal To deliver a successful project with particular care that the thin bonded overlay provided a high-quality wearing surface with excellent rideability. ## Our Solution We provided a qualified inspector with ACI and TXDOT certification on an “as needed” basis. This addition gave us the ability to provide construction inspection and material testing on-site, avoiding the need for additional dedicated resources and resulting in significant cost savings.  Additionally, the proximity of our Dallas office to the construction site reduced the costs of related vehicle expenses and trips. Due to heavy traffic within the project limits, much of the work occurred on nights and weekends. Our ability to provide the staff needed for Ultra-Thin Bond Overlay and Type D placements along with two plant HMA 1A technicians and two field HMA 1B technicians on 12-hour shifts from Friday night through Sunday night was critical. During each shift, we utilized one Level 1A technician at the plant to sample material and perform 1A testing.  HVJ’s 1B technician monitored hot mix placement on site as well as performing testing. 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