Smart count08:42:00

Counted today: 12,480
Mean speed: 38 km/h
Buses an hour: 62

Sample data, for display

Rahyaft Andisheh Farda Consulting Engineers · since 2001

Transport engineering for smoother, safer cities

Rahyaft Andisheh Farda Consulting Engineers, since 2001: transport planning, traffic engineering, roads, rail and airports, with one aim — better transport, cleaner travel, fewer crashes and safer people.

Our servicesProjects in 24 provinces

Grade 1 in traffic and transport
ISO 9001:2015
Trusted consultant to Tehran Municipality since 2010
Representative of the Dutch NBP in Iran

years, since 2001: years, since 2001
studies: studies
report volumes: +report volumes
provinces: provinces
clients: clients

Services

Fourteen disciplines, from planning to supervision

Grade 1 in traffic and transport; grade 3 in roads, urban planning, rail, airports and passive defence.

All services

Traffic and safetyTraffic EngineeringJunctions, corridors and city centres: geometry, signal timing and management, built on data and simulation.

Traffic Control Devices Operation Improvement
CBD Management
Intersection and Interchange Design

Planning and studiesTransit PlanningBuses, bus rapid transit and rail planned as one network, not as separate lines.

Integrated Public Transportation Plan
Rail Transit System Feasibility Studies and Planing
BRT Network Design

Roads, rail and airportsRoad and Highway EngineeringAlignment, junctions, pavements and structures, from geometric design to upgrading existing roads.

Road and Highway Design
Road Infrastructure Design
Road Pavement

Simulators

Weigh a decision yourself

Three simple models from Rahyaft's daily work: move the number and see what it does to a junction, a corridor and a person crossing.

Signal timing

Change the main road's share of green: the queues grow or shrink before you, and delay follows Webster's formula.

Main road's share of green55٪

Mean delay: 22 s
Level of service: C
Longest queue: 7 veh

Public transport share

The corridor's trips stay the same; as the bus share rises, cars thin out and travel time and emissions fall.

Public transport share15٪

Cars an hour: 3,269
Travel time: 9٫6 min
CO₂ an hour: 2,988 kg

Safe speed

Someone steps onto the crossing 32 m ahead. At what speed does the driver stop in time? Reaction 1.5 s, braking on dry asphalt.

Vehicle speed50 km/h

Stopping distance: 35 m
Margin: —
Impact speed: 22 km/h

The models are simplified, for illustration; a real study uses counts and a calibrated model.

How we work

From data to design

Every Rahyaft design starts with a count and is tested on a model before it is built.

Signal cycle: 14 s
Vehicles through: 0
People across: 0

A simulated sample junction, not real data.

Before and after

The same street, once designed

Six familiar places in our cities, seen from one spot: as they are, and as traffic engineering and street design rebuild them. Drag the handle.

From Rahyaft's Instagram

BeforeAfter

The site has closed the footway and sent people into the road. A covered walkway, apart from the traffic and clearly signed, gives them their way back.

Projects

211 projects in 24 provinces

From Khorramabad's master plan to Shiraz's cycle network. Pick a province to see its projects.

All 211 projects

Projects listedWorked inNone listed

Most projects

Tehran22
Fars5
Golestan3
East Azerbaijan3
West Azerbaijan3
Alborz3

Pick a province to see its projects.

About

Rahyaft Andisheh Farda Consulting Engineers

Rahyaft Andisheh Farda Consulting Engineers began in 2001 to offer consulting in transport planning and engineering, traffic engineering and road engineering, and has since widened its work to the related disciplines.

To raise the quality of our consulting and training, keep our data and tools current, and grow through our clients' satisfaction: a leading firm built on current engineering ideas and capable people.

Everything my colleagues and I do at Rahyaft aims at one thing: well-organised, creative work delivered on time to clients across Iran, so that transport improves, clean transport grows, crashes fall and lives are saved.

Dr Mehdi Hassanzadeh EsfahaniChief Executive

About Rahyaft Managers and key staff

Grades from the Plan and Budget Organisation

1Traffic and transport
3Road building
3Urban planning
3Railways
3Airports
3Safety, risk reduction and passive defence

ISO 9001:2015Quality managementISO 29990:2010Learning services

Management

Mehdi Hassanzadeh EsfahaniCEO · 26 years' experience
Yasser SharifTechnical Director and Vice Chairman of the Board · 15 years' experience
امیر همایونی رادعضو هیئت مدیره و کارشناس ارشد پروژه · 12 years' experience
Mehrdad Ali Moradiadvisor

Member of the Iranian Society of Consulting Engineers
International Road Federation (IRF) certificate

Approved by 0 bodies, among them . Credentials

Knowledge

We wrote 12 of the country's guidelines

Guidelines, books, a monthly and courses: what 25 years of work have taught us, published for everyone.

Knowledge base

0documents: guidelines, standards and terms of reference

View

Issue 29

The Rahyafti No monthly

29 issues so far. Get the next one by email.

Courses and webinars

View

News

Latest

All news

3/12/2019

Bicycle policy plan of Antwerp city 2015-2019

Part 1: CHALLENGES, VISION, AMBITION

11/24/2018

Blockchain: the next big thing for ITS?

veryone’s heard of blockchain – but most people are less sure about what it really is, and how it might be used in transportation. Andrew Williams peers into cyberspace to find some answers