Road & rail design support for the United States
Overnight design capacity for US civil and transportation firms. Your engineers mark up at the end of the day; the updated model and sheets are waiting next morning – to AASHTO, MUTCD and your state DOT manual, in US customary units.
What we work to
| Document | Full title / edition | How we use it |
|---|---|---|
| AASHTO | ||
| Green Book | A Policy on Geometric Design of Highways and Streets, 7th Edition (2018) | Design controls, sight distance, alignment, cross-sections, intersections (8th edition in development) |
| Interstate | A Policy on Design Standards – Interstate System (2016), incorporated by 23 CFR 625.4 | Interstate criteria incl. 16 ft vertical clearance |
| RDG | Roadside Design Guide, 4th Edition (2011) | Clear zones, barriers, end treatments |
| LRFD BDS | AASHTO LRFD Bridge Design Specifications, 10th Edition (2024) | HL-93 live load and bridge interfaces |
| FHWA & federal | ||
| MUTCD | Manual on Uniform Traffic Control Devices, 11th Edition (Dec 2023, incl. Revision 1) | Signs, markings, temporary traffic control |
| HEC-22 | Urban Drainage Design Manual, 4th Edition (FHWA-HIF-24-006, 2024) | Gutter spread, inlets, storm drains |
| 23 CFR 625 | Design Standards for Highways | Applicable federal-aid design standards |
| State DOT manuals (examples) | ||
| Caltrans HDM | Caltrans Highway Design Manual, 7th Edition, with Manual Change Transmittals | California State Highway System design |
| Other DOTs | e.g. TxDOT Roadway Design Manual, FDOT Design Manual, PennDOT Design Manual Part 2 | Applied per state, with the DOT's CADD standards and workspace |
| Railway | ||
| AREMA MRE | AREMA Manual for Railway Engineering (2025), incl. Chapter 1 Roadway and Ballast and Chapter 5 Track | Track alignment, spirals, superelevation |
| 49 CFR 213 | FRA Track Safety Standards | Operating limits that frame the design |
| Tunnels | ||
| NFPA 502 | Standard for Road Tunnels, Bridges, and Other Limited Access Highways (current edition) | Fire-life safety inputs to the tunnel cross-section |
| Specification adaptation | ||
| Criteria matrix | Mapping of your source standard (e.g. DMRB, EN, Gulf/AASHTO-based) to AASHTO and the relevant state DOT manual | Flagged non-compliances and proposed changes for your Engineer of Record |
We design to the edition, amendments and national annexes named in your project's design basis, under your firm's design responsibility and checking procedures. Editions listed are those current at the time of writing.
Typical packages for the United States
- Plan & profile and cross-section sheets in the DOT workspace
- Intersection and interchange geometry, sight distance and turning-movement checks
- Signing and pavement marking plans to MUTCD
- Track alignment for sidings, yards and transit extensions to AREMA
- Quantity take-off by DOT pay items
- Specification adaptation (below)
Specification adaptation
Moving a design – or your team – from one set of standards to another? We prepare a design-criteria matrix that maps each requirement (design speed, sight distance, cross-section elements, superelevation, clearances) from the source standard to AASHTO and the relevant state DOT manual, flag non-compliances and propose changes. Our lead engineer has applied AASHTO-based criteria on highway projects in Qatar since 2017.
Drawings are prepared under the direction of your Professional Engineer of record, who reviews, seals and submits them. We do not offer PE-sealed services.
Türkiye is 7 h ahead of US Eastern time in summer and 8 h in winter
Other markets:
Have a package that needs extra hands?
Send us the scope, standards and deadline. We reply within one working day with a resourcing proposal.