Simplify the following text for a Grade 15 native English-speaking person.
Original: While plans for these lines , as well as those currently under construction , were formulated long before , the Land Transport Authority 's ( LTA ) publication of a white paper titled `` A World Class Land Transport System '' in 1996 galvanised the government 's intentions to greatly expand on the existing system .
Simplified: While plans for these lines , as well as those being built , were made long before , the Land Transport Authority 's ( LTA ) publication of a white paper entitled `` A World Class Land Transport System '' in 1996 showed the government 's intentions to greatly expand on the existing system .