Exactly a decade ago, going from Ambala to Chandigarh was a nightmare. This was because the road was just single lane and there was no divider in between. The single lane coupled with very high traffic made driving a hell. The common news was an accident every day. For more, read this news article.
The expressway was handed over to GMR Group in early 2006. In Dec 2008, the expressway was inaugurated. IT IS of course signal free. The most accident prone points were Zirakpur Traffic Point, the crossing near Dhillon factory, road divider point near the Dera Bassi Police station and all T-points of roads leading to villages. The expressway is tolled road and is 4 laned with clear dividers, and there is a 12 lane toll plaza. Apart from these, all traffic points have flyovers which will avoid traffic congestion on a single road. Now, this 35 km stretch is much easy to cover and can be done in 30 minutes.
Delhi-Panipat 6 lane expressway (built by L&T)
Beautiful roads on Karnataka Maharashtra border (part of Golden Quadrilateral)
Photos courtesy: skyscraper.com