Second main arteial road of Kochi
Sahodaran Ayyappan Road, popularly known as S.A Road is one of the most important and the second main arterial road of CBD Kochi city (after the M.G Road); it is supposed to be the busiest and most congested road in the city of Kochi, which run in east-west direction and the shortest road connecting the two main iconic junctions in the city. The road connects the MG Road in west with Vyttila Junction &amp; Hub in east and continues further as Tripunithura Road that connects to Tripunithura, hence termed as the back bone road of Kochi.
S.A.Road along with M.G.Road are the two main arterial CBD roads connected with the Kochi Metro Rail and moving straight to Vyttila Mobility Hub, where three modes of transport (rail, water and road)converge and diverge, hence making it one of the most expensive and affluent areas in the city and state of Kerala.
Kochi's high-end housing colonies are all branched out from this arterial road such as Panampilly Nagar, Giri Nagar, Gandhi Nagar and Jawahar Nagar. 
Greater Cochin Development Authority (GCDA) &amp; Rajiv Gandhi International Indoor Stadium are located along this road at Kadavanthra.
It is a four lane city road with median separating the two carriageways. The road is one of the oldest road of the city and covers a distance of 3.2 KM. The road is named after famous social reformer, Sahodaran Ayyappan.
History.
S.A. Road was earlier known as Tripunithura Road that was built by Kochi Royal Maramattu (PWD) Department in year 1863 when the capital of Kochi Kingdom was shifted to Tripunithura. The road was constructed to facilitate the King's annual procession to Ernakulam for attending the Annual Durbar at the Durbar Hall. The original road terminated at Chitoor Road near Valanjambalam from where it connect to Durbar Hall Grounds. Later it was extended to MG Road, when the Britishers constructed in year 1926. A connecting road from MG Road to Foreshore road was built when the latter was opened in the year 1988. In 1962 the stretch from Foreshore Road to Vyttila was renamed as S.A Road as this part came under Corporation of Cochin whereas the remaining stretch went to Thrippunithura Municipality.
The original road was just a single lane as there was no cars other than those belonging to Royal family. In year 1936, the road was relaid into 2 lane traffic, which remains even today. As the city grew, many commercial establishments started in this stretch which increased the traffic. Moreover, with opening of Panampally Nagar, Giri Nagar, Kadavanthra residential areas along with growth of Vyttila Junction made the road terribly congested heavy traffic. With less availability of land on both sides, land acquisition became extremely difficult.
In year 2000, the Corporation of Cochin decided to go ahead with forcible land acquisitions, thereby the stretch from South Overbridge to Vyttila was able to relay into 4 lane road with some areas still under construction.
References.
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