A ? Crash history danger
Indicates the site is linked to a documented crash-risk context. The map reflects the presence of this official label for the corridor group, not a live crash prediction.

B ? Verified complaints focus
Used when concerns have been recorded and validated through official channels. This is a policy justification label in the dataset, not a real-time measure of driver behaviour.

C ? Police intel site
Indicates the corridor listing is supported by enforcement intelligence. The map shows the existence of this reason label without exposing operational details.

D ? Road / environment risk
Used when layout, conditions, or surroundings are recorded as contributing risk factors. This is a plain-language expansion of the official label for clarity.