The trumpet Interchange is a conventional interchange design
consisting of four ramps, two on-ramps and two off-ramps. The common use of this interchange is for highways terminating at another highway, forming a "T" connection. This interchange allows motorized vehicles to move through both on and off ramps without any intersection interruption. However, this interchange is not favorable for non motorized users as it does not provide intersections for safe crossing.
The traffic team initially used Synchro 9 to perform the traffic analysis for the various intersection within the trumpet alternative. This interchange, however, was eliminated fairly early on as it did not allow for future extension of Jack Rabbit Trail through to connect to the residential area to the north of the SR-60 and to Oak Valley Parkway. As a result, a full traffic analysis was not performed for this alternative.
The trumpet interchange allows for a fast-paced traffic flow with uninterrupted turning points for on and off ramps. Traffic analysis shows that this design is adequate for the volumes from residential complex and industrial facility. However, this design does not accommodate pedestrians and bikers as efficient as vehicles. Furthermore, the design eliminates access to the northern region which hindered any further development in future.
The trumpet interchange design proved to be sufficient for future traffic demands, and does not provide further road network development and accommodation of other transportation mode. Therefore, it was rejected and eliminated from the list of viable alternatives.