Trailer - Assignment & Tracking

Hi,

We have a unique scenario for fleet and I request your kind suggestions on this..

I know that we can have a combination of assets assigned to the shipments such as power unit, driver and equipment. But, is there any way with which Trailers (one used to carry equipment) can be assigned to a shipment and tracked at a later point of time?

It would be very helpful if you could provide any work around or thought on this?

Thanks
CTP