infrastructure in Jeddah was constructed during this period (Al-
Hathloul & Mughal, 1991; Daghistani, 1993) and was predominantly
shaped by a linear grid pattern with satisfactory
connectivity.
Although road length in all road infrastructure categories
(Fig. 7) continually expanded after 1980, only the secondary road
category increased significantly. Highways and primary roads remained
steady from 1980, with only minor changes in 1993 and
2007.
The results indicate that secondary roads expanded in different
parts of Jeddah, with most of these roads serving as main access
points for residential development (Daghistani, 1993). The secondary
roads in Jeddah are predominantly laid out in a grid pattern,
with good connectivity to highways and primary roads. The transportation
infrastructure expansion in Jeddah has followed the proposed
locations by Jeddah Municipality’s master plans of 1962,
1973, 1981, 1987 and 2004.