No problem for DDs to use CTE tunnel. CTE tunnels have a
height cleareance of 4.5m and our DDs are 4.4 m high.
Off service DD buses are authorized to use CTE...
You may wish to know Premium 534, from YCK Rd to Fullerton Rd,
is a DD service and it plies thru the CTE tunnel without any
problem.
add on: 535 used a DD before without a problem with the height at
CTE