both transverse and longitudinal cutters can cut under existing utilities, check the following examples

Longitudinal

http://picasaweb.google.com/erkat.me/ER15003LOnVolvoEC290BLCDohaQatarTre...

Transverse

http://picasaweb.google.com/erkat.me/ER1200OnVolvoEC360BLCWakrahQatarUnd...

http://picasaweb.google.com/erkat.me/ER15003XOnHyundai450NorthDohaQatar#

http://picasaweb.google.com/erkat.me/ER15003XQOnDoosanS300LCVRiyadhSaudi...

All cutters can cut in all directions, simply, where ever the excavator arm can reach.

if you need more information, just send me your phone no. in private msg. that I can call you.