GER Category 3 common mistakes
GER Category 3 · Understand the traps and how to avoid them.
Memorising signal aspects as isolated shapes and colours, then giving the aspect name without the action it authorises, so a question that asks what the driver must do on sighting a given aspect is answered with the label only.
Revision materials and route cards often present signals as a picture-to-name list, so candidates learn recognition rather than the meaning-action link the exam actually tests.
What to do instead
For every signal in your route and rule book, write three columns: aspect shown, meaning/authority, and required driver action (including speed or stopping point). Self-test by covering the aspect column and working from the action back to the aspect.
Treating a restrictive or cautionary aspect as permission to continue at the previous line speed until the next signal is seen, rather than braking immediately to be able to stop short of the obstruction or at the next signal.
Candidates conflate 'proceed' with 'proceed at normal speed' and underestimate how much braking distance is consumed before the driver reacts.
What to do instead
Practise braking-distance and reaction-time calculations for the stock you sign, and rehearse the rule that a cautionary aspect requires immediate reduction of speed to a level from which you can stop at the next signal or obstruction.
Reciting route knowledge as a list of station names and signal numbers without the associated gradients, speed restrictions, tunnel and bridge features, or platform lengths that determine how the train must be driven.
Route learning is often done from maps and diagrams at a desk, which capture topology but not the driving-relevant characteristics.
What to do instead
Build route notes that pair each location with gradient, permissible speed, signal positions, stopping points and known hazards, and confirm them on the route in daylight and darkness, in both directions, before assessment.
Answering abnormal-situation questions with the recovery goal (get the train moving, restore the timetable) instead of the prescribed sequence of protection, communication and authority.
Experienced instincts and operational pressure push candidates toward the outcome, while the exam marks the process: securing the train, protecting the line, informing the signaller, and obtaining authority before any movement.
What to do instead
Learn each emergency procedure as an ordered checklist with the first three actions fixed, and practise stating them aloud under time pressure so the sequence, not the outcome, drives the answer.
Using vague or conversational phrasing in communications answers, such as 'telling the signaller what happened', instead of the standard structure: identification, exact location, nature of the incident, whether the line is obstructed, and what assistance is required.
Candidates know the content but not the mandated message format, and exam questions reward the structured elements rather than the intent.
What to do instead
Memorise the standard emergency and routine message formats and practise composing them for sample scenarios, checking that every required element is present and in the correct order.
Describing braking technique as simply 'apply the brake' without addressing brake propagation, the difference between direct and automatic brake application, or how gradient and train length change stopping distance.
Practical driving feels like a single action, so the underlying pneumatic and dynamic behaviour is skipped during study.
What to do instead
Study brake system behaviour for the traction you sign, including application and release times along the train, and work through stopping-distance examples on level track, rising gradients and falling gradients.
Answering fitness and conduct questions with generalities about 'being fit for duty' rather than naming the specific disqualifying factors, reporting obligations, and limits on hours, rest and substances.
Candidates treat this domain as common sense and do not read the prescriptive requirements, so they cannot state thresholds or the duty to report.
What to do instead
Learn the specific rules on rest periods, maximum continuous working time, medication and alcohol, fatigue reporting and the obligation to declare changes in medical status, and test yourself on borderline scenarios.
Confusing the roles and authorities in the safety hierarchy, for example assuming a handsignalman can authorise movement past a signal at danger or that a shunt signal confers main-line authority.
The rules use similar vocabulary for different authorities, and candidates learn definitions without mapping them to who may do what.
What to do instead
Draw an authority matrix: for each movement type, list who may authorise it, in what form, and what documentation is required, then check every past-paper scenario against the matrix.
Ignoring the wording of qualifiers in questions, such as 'except', 'first action', 'minimum' or 'in the absence of', and selecting an answer that is true in general but wrong for the specific condition asked.
Time pressure and pattern-matching to familiar phrases cause candidates to read the stem as a topic prompt rather than as a precise instruction.
What to do instead
Underline the operative qualifier before reading the options, and eliminate any option that does not satisfy that qualifier even if it is otherwise accurate.
Leaving documentation questions to last and answering from memory of forms rather than the required content, retention and completion rules for logs, incident reports and notices.
Paperwork feels secondary to driving skills, so the specific fields and timing requirements are never systematically learned.
What to do instead
Obtain the actual forms and notices used on your route, list the mandatory fields and deadlines for each, and practise completing a specimen incident report and daily log against the checklist.