ITE Journal - May 2021 - 24

| inside the industry

Innovative Color Guidance
Lane System in South Korea to
Enhance Road Safety and Efficiency
This paper examines a unique system-color guidance lane-to see how it enhances safety and even
the efficiency of vehicles on roads. Korea Expressway
Corporation (KEC), which designs, constructs, and
manages almost all expressways in the country, developed an innovative and unique color guidance lane
system (referred to in this article as " the system " ).1
The system was initially proposed by a KEC employee
in 2012 and then adopted nationally in 2017. To the
best of the author's knowledge, it is the first such
system in the world implemented for expressways, as
shown in Figure 1.
At first, the police agreed to a pilot project in the
Ansan junction area in 2012, which had an average
of 25 crashes per year. After the demarcation of the
color guidance lane there, the number of crashes
annually saw a significant drop, decreasing to just
three, which happened during the rainy season.
Soon, more pilot projects were carried out, and a
comparison between the data of 2011 and 2015
showed a 27 percent decrease in crashes on average.
In 2017, the system was implemented nationwide for
Korea's expressways. The Ministry of Land, Infrastructure, and Transport (MOLIT) even developed

and distributed the color guidance lane manual
(hereafter " the manual " ).2
According to the manual, pink is used for single
destination guidance. Light green with pink is used
when there is a need to guide two directions, as
shown in Figure 2. Natural green is also acceptable
when the color of the road surface is right, ensuring
adequate visibility.

Single destination guidance

source: MOLIT, 2017

By Chunho
Yeom, Ph.D.,
Assistant Professor,
University of Seoul

Dual destination guidance
Figure 1: Color Guidance Lane on Expressways in Korea.
24

May 2021

i te j o urnal

Figure 2: Width of a Color Guidance Lane
Note: units (cm)



ITE Journal - May 2021

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