Road & rail design capacity, when your team is at full stretch.
RoadRail Design is a Turkey-based team of highway and railway design engineers. We plug into your projects as an extension of your design office – working to your standards, templates and software – so you can take on more work without hiring ahead of demand.
Initial ideaUse a 275 m crest curve between a +2% and a −3% grade to save cutting.
The standardCD 109 Table 2.10 gives a desirable minimum crest K value of 100 at 100 kph (stopping sight distance 215 m), and para 5.4 sets curve length as K × grade change. 275 m gives K = 55 – one step below desirable, a relaxation that needs justification.
So weLengthened the crest to 500 m (K = 100) and lifted the profile slightly to rebalance earthworks, so no relaxation is needed.
Ref: DMRB CD 109 Highway link design, Table 2.10 and para 5.4
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Illustrative scenarios showing how we apply each market's standards – not descriptions of past RoadRail Design projects.
Timezone-friendly. Türkiye is on UTC+3 all year: 2–3 hours ahead of the UK, 1–2 hours ahead of the Netherlands, and an overnight turnaround for US teams.
Cost-efficient. Experienced engineers at rates that make subcontracting a peak worthwhile – no recruitment, no bench cost.
Your standards, your templates. We adopt your CAD standards, title blocks, layer conventions and checking procedures.
Engineer-led, not just CAD. Packages are led by an engineer who has run design teams on major expressway, metro and light rail projects.
Confidential by default. We work under NDA and, where you prefer, inside your own VPN, Common Data Environment or remote desktops.
Track record
Selected project experience
Our lead engineer's references span a 33 km urban expressway in Qatar, a 69 km underground airport metro in Istanbul and a 69 km mountain highway around a major dam.
ExpresswayInterchanges
Al Khor Expressway
Doha – Al Khor corridor, Qatar · 2017 – 2022
Design Chief – Highway & Infrastructure Design
33 km corridor with 10 interchanges2×5 lanes 32.5 km expressway62 km 2×2 ramps and loops
MetroAlignment
Gayrettepe – Istanbul Airport – Halkalı Metro (M11)
Istanbul, Türkiye · 2016 – 2017
Senior Railway / Transportation Design Engineer
69 km fully underground line16 stations120 km/h design / operating speed
Mountain highwayTunnels
Yusufeli Dam Relocation Roads
Artvin, Türkiye · 2013 – 2015
Highway Design Project Manager
69.2 km as built, in 3 sections56.7 km in 39 tunnels19 bridges & viaducts (3,615 m)
