Page 56 - U4SSC Case study Daegu, Korea (Republic of), February 2022

Figure 24: Daegu air quality traffic lights In addition, fine particulate matter traffic
lights are installed to display colours (blue,
green, yellow and red) according to the
concentration of fine particulates through
real-time atmospheric information such that
the concentration of fine particulates can be
checked by inhabitants and commuters.

To reduce fine particulate re-scattering from
the roads, a demonstration was carried out
by installing a dampening wall at Dong-il
Elementary School in Daegu.

By installing 30 dampening walls at a distance of 60m, fine particulates are collected and discharged
automatically to the sewer using the vehicle wind and a gravity particulate collection method
generated when a vehicle passes by. This new pilot system is 5.6 times more efficient at collecting
fine particulate matter than current systems (based on daily collection of particulates of PM -
10
289 mg/m2 vs 51.4 mg/m ). This has the same effect as creating a forest of about 70 m in length
2
by planting trees 5 m apart between the driveway and the sidewalk.

6.2.2 Urban greening policy promotion (Green Daegu)

To create a more beautiful and pleasant urban landscape, Daegu has been promoting the Green
Daegu Planting Project since 1996. Daegu has planted 44.4 million trees as follows:

Figure 25: Daegu Arboretum
1st Planting:
10.93 million trees from 1996 to 2006
2nd Planting:

12.08 million trees from 2007 to 2011
3rd Planting:
11.64 million trees from 2012 to 2016
4th Planting:
9.75 million trees from 2017 to 2020

Through this project, more green areas and parks are available and can be enjoyed by residents
for recreational activities. Other benefits include the reduction in airborne particle matter and the
mitigation of the urban heat island phenomenon.

38 U4SSC Case study | Daegu, Korea (Republic of) | February 2022