http://talk2lta.lta.gov.sg/index.jspRefer to the poll on the right of the page link above.
The Question:
How do you feel about driving underground for a continuous stretch of 9 kilometres in the Kallang/ Paya Lebar Expressway? CTE has two stretches that are underground, and they total 2.4 km only.
a) I do not think driving underground is an issue. It should be the same as driving on an open expressway at ground level.
b) IÂ’ll feel anxious since I do not know what to expect. After all, KPE will be the longest underground tunnel in South East Asia.
c) As long as there is clear signage and sufficient directions before and in the tunnel, I think it should be alright.
Note: I do not work for LTA.