Above: DT4 seen in Westmoreland Street on route 19 to Jamestown Road in Finglas on Saturday 20 September 2003.
In 2003 Dublin Bus ordered 10 Dennis Tridents with Transbus (the new name for Alexander) ALX400 bodies. These are used on routes 19/A and have sent RH111-120 back to Phibsboro to replace the remaining P class DAFs in service there.
The DT class are similar to the AV class in that they have the same body (ALX400). However there are some small differences such as grills.