Where do you have to anticipate encountering rail crossings with no technical safeguards?

You answered correctly. In Germany, rail crossings without technical safeguards—like barriers or lights—can often be found on less-frequently used roads, in industrial zones and port areas, and on dirt or forest tracks. These locations may not justify the expense of full traffic control systems because of low traffic frequency. As a driver, you should always approach rail crossings in these areas with special caution, check for trains yourself, and be prepared to stop. This helps ensure safety even where automated systems are not present.