To transport loads in a vehicle safely and legally, it is essential that **the lighting or luminous signaling devices are not obscured**. This is crucial because:

- **Visibility and safety**: The vehicle's lights and warning signals are essential for other drivers to see and understand the driver's intentions, such as braking or turning. If the load covers them, road safety is compromised.

- **Legal requirements**: Regulations establish that the load must not cover the vehicle's lights or warning signals. This ensures that the vehicle is visible and that the driver's signals are clear to other road users.

- **Proper load distribution**: In addition to not covering the lights, the load must be well distributed and secured to maintain the vehicle's stability and prevent it from moving, falling, or causing distractions to the driver.


In summary, ensuring that the load does not obscure the lighting or signaling devices is essential to comply with traffic regulations and guarantee the safety of everyone on the road.