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9.4.1 HIGHWAY NETWORK HIERARCHY

9.4.2 FUNCTIONAL HIGHWAY NETWORK HIERARCHY

a. Principal Highway System

To cater for corridor movement with long trip length and high

density commensurate with national and interstate travel. The North-

South Highway, NKVE are examples of express way in this category. The

Figure 9.8: Functional Highway Network Concept

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Bukit Kayu Hitam- Gurun Highway, Senai- Johor Bahru Highways are

example of highways defined above.

b. Minor Highway System

To cater for movement between state regional centres. The major

federal routes 1, 2, 3, 4 and 5 are example of routes that make up this

minor highway system.

c. Primary Road System

Roads under the system generally serve intra-state movement

rather than inter-state. Some federal routes and most of the states roads

are examples of routes forming this road system.

d. Secondary Road System

These routes that form the road network within a district of

regional development areas. Most of the state roads come under this

category of classification.

Table 9.2: Functional Highway Classification & Design Standard

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9.4.3 GENERAL GUIDELINES

- The capacity of designated routes can be increased by segregating

different forms of traffic and by restricting vehicular access to

frontages.

- The risk of accidents can be reduced and junction capacities increased

by reducing the number of intersections and vehicular conflicts on

the designated traffic routes.

Urban Road Network

Hierarchy

The categorization and

management of existing urban

road system in the form of a

hierarchy of roads are

conceptualized on the following

premises:

- Activities more closely

related to frontage buildings

can be given more space

when environmental and

access functions are allowed

to predominate;

- Activities which are

incompatible with traffic

flow can be restricted on

designated routes where

traffic movement should

predominate.

Figure 9.9: Functional Urban Road

Network Concept

Primary Distributor

District Distributor

Local Distributor

Access Road

Pedestrian Street

Legen

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- The overall environmental impacts of traffic can be reduced by

concentrating flows onto fewer routes; and

- The rate of return on new investment designated to improve traffic

flow, reduce accidents and mitigate environmental intrusion can be

increased by concentrating traffic movements onto a few selected

corridors.

Table 9.3: Width of Motorcycle Lane

Volume of

motorcycle/hr.

Width of Cycle Lane (m)

Minimum Desirable

1000-1500 2.0 2.5

1500-2000 2.5 3.0

> 2000 3.0 3.5

Table 9.4: Typical Characteristics of Urban Road (Network

Hierarchy)

Pedestrian

street

Access

roads

Local

distributors

District

distributors

Primary

distributors

Designspeed 32 kph 40 kph 50 kph 60 kph 80 - 100 kph

Carriage-

way width

4.8 m

(min)

5.5 m

(min)

6.75 m

(min)

7.3 m

(min)

Horizontal

alignment

20 m

(min)

25 m

(min)

35 m

(min)

127 m

(min)

Footway

provision

Junction

spacing

20 m

(min)

20 m

(min)

- opposites

junction

50 m

(min)

adjacent

junctions

50 m (min)

-opposites

junction

100 m (min)

-adjacent

junctions

100 m (min)

- opposites

junction

100 m (min)

- adjacent

junctions

300 m (min)

- opposites

junction

500 m (min)

- adjacent

junctions

Typical

traffic

flow

50 - 300

veh/day

300 - 750

veh/day

300 - 750

veh/day

500 - 1500

veh/day

5,000 -

20,000

veh/day