Many of the same challenges appear on LRT projects, often in a more compressed and visible form. LRT systems operate closer to the public realm, with frequent interfaces at level crossings, stations, and shared corridors. From an assurance perspective, this places greater emphasis on managing interfaces, transitional states, and operational assumptions as systems move toward revenue service. From an Independent Safety Assessor’s perspective, much of what underpins rail safety in Canada will feel familiar to practitioners elsewhere, but the way it comes together matters. The Canadian Rail Operating Rules provide a single, nationally applied operating rulebook across a geographically large and operationally diverse network. In practice, CROR shapes not only how trains are operated, but how change is absorbed. Proposed design or operational changes to the GO Transit system map are often tested as much against how they fit within existing CROR-based practices as against formal technical requirements. Safety management systems are equally central. Under the Railway Safety Act, Canadian railways are required to implement formal Safety Management Systems, and for passenger rail, this is reinforced through CSA guidance specific to passenger railway systems. From an assurance standpoint, SMS is not simply a compliance artefact. It is the structure through which organisations demonstrate how responsibilities are defined, how hazards are identified and managed, and how decisions are justified as projects move from design into construction, testing, and operation. Within that broader framework, approaches such as CMREA have become increasingly relevant in practice. The emphasis on selecting assurance methods proportionate to risk provides a useful reference point for assessing whether the level of analysis and evidence applied genuinely matches the nature of the change. In day-to-day assurance work, this often shows up not as a formal exercise, but as a way of framing questions around scope, assumptions, and residual risk. Level crossings are one area where safety considerations become particularly visible. In Canada, passenger and commuter services often pass through dense urban environments with great number of public crossings, many of them legacy interfaces that predate current service levels. From an assurance standpoint, crossings are rarely about a single technical issue. They sit at the intersection of railway operations, road authorities, standards, and public behaviour. Changes to service frequency, train speed, or operating patterns can quickly alter the risk profile, requiring reassessment and coordination well beyond the railway boundary. In practice, crossings are often where the cumulative effects of incremental change become most apparent. Environmental conditions also sit quietly in the background. Severe winter weather is treated as an assumed operating condition rather than an exception, influencing design, maintenance practices, and operational decision-making. Cold temperatures, snow, and ice are not edge cases; they are part of the baseline context within which the railway is expected to function. None of these elements is unique in isolation. What makes the Canadian context distinctive is how consistently they overlap. For me, working in Canadian rail has reinforced that safety is rarely demonstrated at a single moment. It has to continue to hold together once systems are placed into revenue service, particularly as the railway around them continues to change.