 For example, a train authorized only in Anna block must stop at the End Anna Block sign, which is a short distance from the switch points.A train authorized in Anna through Bess or in Anna through Bess Siding may proceed past the End Anna Block sign, over the switch, and then past the Begin Bess (or Bess Siding, as applicable) Block sign.Blocks are typically named after a distinguishing feature within the block, such as a station, town, or river.