The document discusses modifying Shiraz, Iran's one-way street network to improve traffic. Shiraz has a population of 1.46 million and faces traffic problems like long traffic light delays and queues. The municipality analyzed traffic data and simulations to identify the best one-way street scenarios. Implementing one-way streets reduced traffic light phases and cycles, removed some lights, increased travel speeds, freed up road space, and reduced air pollution and accidents at a low cost. However, issues with increased walking distances and lack of studies were identified that need addressing. Modifying to one-way streets was deemed a good short-term measure but requires more analysis and consultation.

1. Improvement of Traffic by
Modify of One-way Street
Network
(Case Study: Shiraz, The land of “One Thousand and One Nights”
Hamed Khosravi
Traffic & Transportation Engineer
Shiraz Municipality
Iran

2. Introduction Of My City
Population 1,460,665
Area 240 km2
Transport Bus, Airport, Rail, Metro, Taxi
Iran is located in the middle east and Shiraz is located in the south of Iran.
Shiraz is the third Metropolis of Iran and the capital of Fars Province.

3. Municipal
Council
(Showra)
Mayor of
Metroplois
8 Deputies
Traffic and
Transportation
Co-ordination
& Planning
Cultural &
Social affairs
Urban
services
Technical &
developmental
affairs
Town-
planning &
architecture
Administrative
& financial
affairs
Districts affairs
10 districts
mayor
Introduction of my Organization
 Municipal Council has municipal
legislative power and elect Mayor
 Mayor has executive power in the city.
 There are numerous departments,
organizations.

4. Problem Identification
Traffic light with long delay time
(four phases)
Traffic light interrupted
With near traffic light queue
Traffic light
With long queue
Traffic light With
high accident ratio

5. One Way Traffic as Solution To Traffic &
Transportation Issues
Traffic Data collecting
By Camera
Simulation of Traffic
By Aimsun8 & Emme4
Find Best Scenario

6. Achievements
Traffic light with Short delay time
(two phases) Remove Traffic Light
Traffic light
With Short Cycle
Remove Traffic light

7.  Increase Travel Speed, travel time although travel distance increases
sometimes
 Additional road space that has been created by the uni flow can be used for
public transport, pedestrian facilities, non-motorists and parking,
landscaping.
 Bus Priority lanes on one way roads reduce travel time of road passengers.
 Less or no conflict movements at junctions, no intersection control traffic
signals are required (Remove two traffic Light)
 Reduce Air pollution by reducing delay of traffic light
 Improvement of traffic in street network by lowest price
Benefits in the system

8. Issues faced and measures taken
issue measure
Walking distance of the public transport users
increased
Proper arrangement of bus routes, stops
Improve the walkability on streets
Fragmentation of bus services, Proper arrangement of bus routes, stops
Poor awareness of the uses regarding
systems and where to turn to go destination
Provide information signs where necessary
Increasing of traffic floor on some residential
roads
Traffic calming measures and regulatory
signs
Difficulty of cross the roads with speed
increases
Provide Traffic signalized pedestrian facilities
Change of two way road infrastructures to
one way
Commence the system with minimum
alterations and develop full infrastructure at
the rehabilitation

9.  35km road length (9% of city roads)has already been arranged as one way roads.
 there is no proper ‘before and after’ study
 no proper cost benefit analysis
 no proper survey on public perception,
 no proper consultation with other stakeholders
 .
Present Status & issues to be addresed

10. Recommendations
 Uniflow traffic systems is a good measure for the traffic & transportation issue in
areas where roads are in close proximity to each other, where making roads one-
way will decrease both distance travelled and time taken for travel

11. THANK YOU FOR YOUR ATTENTION
Persepolis (Takht-e Jamshid)
My public page address:
https://www.researchgate.net/profile/Hamed_Khosravi4