The vehicles are propelled by two long stator LSMs, one on either side. This type of motor requires that the guideway be divided into blocks with no more than one vehicle in a block. LSM cost is dominated by the cost of the stators so we intend to use the smallest stators consistent with acceptable temperature rise of the windings and good motor efficiency. In order to increase efficiency we intend to decrease block size, but of a separate inverter for each block would increase cost if the block length is small. The most cost effective design is to divide the blocks into sub-blocks that are relatively short and only excited when they contribute to propulsion. An inverter can be switched to excite a specific sub-block using switches that are substantially less expensive than inverters.