RoadRail DesignRoad & rail design capacity
ENTR
Home / Projects
References

Project experience

Selected projects delivered by our lead engineer, Cemal Koçak, over more than 20 years with contractors and engineering consultancies – from urban expressways and mountain highways to metro and light rail.

ExpresswayInterchangesUtilities

Al Khor Expressway

2017 – 2022
Role
Design Chief – Highway & Infrastructure Design
Location
Doha – Al Khor corridor, Qatar
Client
Ashghal – Public Works Authority of Qatar
Employer
Tekfen Construction (design & build contractor)

Scope

  • Led and coordinated highway and infrastructure design across Highway, Structures, Traffic, Wet Utilities (stormwater, potable water, TSE, foul sewer) and Dry Utilities (power, telecom, government networks)
  • Prepared and reviewed road and infrastructure designs to Qatari national standards and Ashghal requirements
  • Design revisions for site constraints, constructability and authority comments; design approvals with utility stakeholders
  • Key interface between design and construction teams; value-engineering support

Project facts (public sources)

33 km corridor with 10 interchanges2×5 lanes 32.5 km expressway62 km 2×2 ramps and loops21 km 2×3-lane service roads33 km 7 m wide Olympic cycle trackQR 7.6 bn contract value (2016)
Corridor context. North of Doha the expressway runs alongside the elevated Doha Metro Red Line (North) through the Qatar University – Lusail area, so road, drainage and utility design required interface coordination with the metro alignment and Qatar Rail assets.
MetroAlignmentDepot

Gayrettepe – Istanbul Airport – Halkalı Metro (M11)

2016 – 2017
Role
Senior Railway / Transportation Design Engineer
Location
Istanbul, Türkiye
Client
Republic of Türkiye Ministry of Transport and Infrastructure
Employer
Yüksel Proje (engineering & design consultant)

Scope

  • Horizontal and vertical alignment design of the metro line (Stage 1 and Stage 2)
  • Depot area design
  • Track cross-sections

Project facts (public sources)

69 km fully underground line16 stations120 km/h design / operating speed2023 – 2026 opened in stages
Network context. The line links Istanbul Airport with the city and interchanges with Marmaray, several Istanbul metro lines and the high-speed rail network, so the alignment had to respect multiple transfer-station interfaces.
Light railStreet runningDepot

Antalya Antray 3rd Stage Light Rail (T3)

2016 – 2017
Role
Senior Railway Design Engineer
Location
Antalya, Türkiye
Client
Public client (Antalya urban rail programme)
Employer
Yüksel Proje (engineering & design consultant)

Scope

  • Horizontal and vertical alignment of the Varsak – Otogar and Otogar – Hastane sections
  • Depot area design
  • Cross-sections

Project facts (public sources)

≈ 24.9 km 3rd-stage lines incl. ≈ 1 km depot link (2018 tender)Varsak – Müze T3 route2019 / 2021 sections opened
Urban context. The route runs largely along existing boulevards, with an underground station where it crosses the T1 line at Otogar (bus station), so track geometry was integrated with road junctions, kerb lines and pedestrian crossings.
Mountain highwayTunnelsViaducts

Yusufeli Dam Relocation Roads

2013 – 2015
Role
Highway Design Project Manager
Location
Artvin, Türkiye
Client
General Directorate of Highways of Türkiye (KGM)
Employer
BOTEK Engineering Consultancy

Scope

  • Led a team of highway engineers and designers from concept to tender design, Km 0+000 – 66+000
  • Design-stage scheme of ≈ 66 km of road with 44 tunnels (≈ 50 km), 18 bridges (≈ 2.1 km) and 3 viaducts (≈ 1.67 km)
  • Applied and defended design standards; obtained approvals from authorities
  • Technical and commercial proposals

Project facts (public sources)

69.2 km as built, in 3 sections56.7 km in 39 tunnels19 bridges & viaducts (3,615 m)17 junctions (5 grade-separated)Nov 2022 opened to traffic
Relocation scope. The dam reservoir flooded the existing town and part of the state road, so the scheme re-routed the Artvin – Yusufeli – Erzurum state road and provided links to the new Yusufeli settlement and local road network (e.g. towards İspir and Sarıgöl – Öğdem), alongside construction-stage access and temporary roads.
International highwayReconstruction

Tashkent – Termez (M39) Highway Reconstruction

2011 – 2012
Role
Senior Highway Design Engineer
Location
Uzbekistan
Client
National road authority
Employer
Pro Yapı Engineering & Consultancy

Scope

  • Preparation of construction (application) design for the reconstruction of the M39 road
  • Highway engineering and consultancy services

Project facts (public sources)

M39 Almaty – Bishkek – Tashkent – Shakhrisabz – Termez international road
HighwaySupervision

Baku – Alat Highway, Km 22+000 – 69+000

2008 – 2011
Role
Senior Highway Design Engineer
Location
Azerbaijan
Client
National road authority
Employer
Pro Yapı Engineering & Consultancy

Scope

  • Construction supervision and highway engineering services, Km 22+000 – 69+000

Project facts (public sources)

≈ 47 km section length (from chainages)Category I, 6 lanes reconstruction standardM-2 East – West corridor (Baku – Alat – Gazakh – Georgian border)
ExpresswayRehabilitation

Baku – Sumgayit Highway Rehabilitation

2008 – 2009
Role
Senior Highway Design Engineer
Location
Azerbaijan
Client
National road authority
Employer
Pro Yapı Engineering & Consultancy

Scope

  • Construction design drawings for the expressway, Km 6+000 – 40+720
  • Highway engineering and consultancy services

Project facts (public sources)

≈ 34.7 km design section (from chainages)
State highwaysRural roads

Turkish State Highway Programme

2005 – 2015
Role
Highway Design Engineer → Senior Highway Design Engineer → Highway Design Project Manager
Location
Thrace, Aegean, Central & Eastern Anatolia, Türkiye
Client
General Directorate of Highways of Türkiye (KGM)
Employer
ENET, Pro Yapı and BOTEK engineering consultancies

Scope

  • İpsala – Malkara and Malkara – Tekirdağ highways (Thrace)
  • Ulubey – Eşme highway (Aegean)
  • Dargeçit – İdil highway, Km 0+000 – 36+066 (South-east)
  • Alaca – Zile – Çekerek highway, Km 0+000 – 17+625 (Central Anatolia)
  • Sivas region: İmranlı – (Refahiye – Suşehri) Km 219+650 – 264+018; (Şebinkarahisar) – Suşehri – (Gölova) Km 567+160 – 587+050; Koyulhisar – Suşehri Km 543+850 – 567+160

Project facts (public sources)

8 state highway design commissions≈ 87 km Sivas region sections (from chainages)
Urban streetsPublic realmDrainage

Beşiktaş Square & Ortaköy Dereboyu Street Rehabilitation

2002 – 2003
Role
Highway Design Engineer
Location
Istanbul, Türkiye
Client
Istanbul Metropolitan Municipality
Employer
MNL Construction

Scope

  • Road design for the Beşiktaş Square rehabilitation and Ortaköy Dereboyu Street rehabilitation
  • Access road and stormwater drainage design for an industrial site
Urban context. The Beşiktaş Square scheme reorganised traffic around the waterfront square to give more space to pedestrians – an early example of the street-design and junction work we offer today.

Projects were delivered by the employers and project owners named. Roles shown are those held by Cemal Koçak at the time. Project figures are taken from project owners' and contractors' published information and describe the project as a whole, not the individual scope. Highlighted context notes describe the project setting and interfaces. Logos and trademarks of third parties are not used, and no endorsement is implied.

Similar work on your desk?

Tell us about your scheme – we'll suggest how to split off a package we can deliver.

Start a conversationinfo@roadraildesign.com