The BRT I have seen there was one way in, one way out. More than 1 crew can be in BRT but before you enter into a BRT with a crew or crews in that BRT, everyone has to be notified, and all movements to be made at restricted speed.
I just asked my neighbor Kevin who worked for MRL as an Engineer and he said that specific line was a one way in and out (drive in, drop off, pick up and back out) during his time with MRL.
I think it was the British who developed a system of safe block occupancy in the early days of railroading by using a marked "Staff" or "Token" for each block. There was only one Staff per block and a crew had to possess it to enter a block. This assured there would never be a collision. When they reached the end of the block, they'd surrender the Staff and be given another one if it was available. It provided safety, but it was inflexible and it impeded train movements and line capacity by its frequent stops and starts. Technology brought signaling and an end to this quaint system of train control.
Approach signal at Clinton, SC where two CSX lines (CN&L/SAL) intersect. A classic searchlight signal. I came upon it at dusk and the lighting was perfect. [November 2017]
It is a branch line, which a portion has been out of service for many long years now. Traffic is very light, usually just a small hand full of grain cars. The days when there might have been any other train occupying those same tracks ended decades ago. One of these days, when it comes time to invest any money for upkeep, BNSF will likely just end service.
Just north of my home village is the remote Dunnerholme crossing. On a typical day it might see a dozen vehicles crossing and maybe a few more foot crossings. When Network Rail revamped it with Yodel sirens and fancy lights they went overboard on signs! At least It's something for all the sheep to look at! As we all know. Too many signs or notices just instills 'Notice blindness' I used to change the notices in the safety display cabinet in the office corridor every month and I used to say to the 'Elf and Safety department' "let me print it out and staple it to their foreheads, they'll get it then" Back on your side of the pond Goleta California April 1998 Looking North In 1998 there was still an Espee wig-wag on South Kellog Kev
The Moon doesn't shine every night! And if you stay on the far side of the sign, you're not trespassing.
Some surviving signs just amaze. In the centre of the sleepy town of Gainsborough in Lincolnshire in 1992 I found an original British railways enamelled sign pointing to Gainsborough Central station. The sign was erected pre-1965 Even older and rarer. At Walkeringham in May 1995 on the Great Northern-Great Eastern joint line was an original GN & GER Jnt Trespassing notice, The railway ceased to exist in 1923 becoming part of the LNER. The concrete post it was fastened to was erected much later At Northorpe, in 1986,the LNER sign was in much better condition. The LNER ceased to exist in 1948, In the frame underneath was a very faded notice issued by the BTC ( British Transport commission) which was formed in 1947 and was dissolved in 1964! Kev
Perhaps some of the iconic signs surviving in the U.K are the ceramic tile system maps used by the per-grouping railways . The magnificent Lancashire and Yorkshire Railway one at Manchester Victoria station. It is huge and leaves you in no doubt how far their empire went On a leess ambitious scale is a surviving North Eastern railway example at Middlesborough station I happen to think that only in the United Kingdom would you be able, in 2025, to buy a brand new one for yourself! https://www.northeasterntilecompany.co.uk/ I am tempted but think they might not be cheap! Kev