I’m referring to the tendency of some people to follow a straight, unbranched path, with no deviations. For instance, waiting for a stoplight to change to green even at midnight even though there are no cars coming from a perpendicular direction.
The expression that I use is streng and eng. It is direct and straightforward, and even rhymes, so IMHO, it does the job. Is this, however, “standard” German, or is there a more idiomatic way to express this idea?