https://ridewithgps.com/routes/49260839

ChatGPT Query: Considering the Central Park Drive downhill sections, [how often] are cyclists likely to exceed the new lower speed limit of 15 mph?

ChatGPT Reply: Using your uploaded TCX file for the Central Park Drive loop, I analyzed:

• Segment-by-segment grade (defined downhill as < -1%)
• Instantaneous speed at each trackpoint
• Time-weighted exposure (not just point count)
• Threshold of 15 mph (6.7056 m/s)

Result

≈ 60.1% of riding time on downhill sections was above 15 mph.

What That Means

On the downhill portions of the Drive:

• A majority of the time spent descending was at speeds exceeding the new 15 mph limit.
• This is consistent with expected gravitational acceleration on the longer descents (e.g., Harlem Hill descent, West Drive southbound, Cat Hill descent).

Important Context

• This reflects natural riding behavior without deliberate braking.
• Even moderate-effort riders typically exceed 15 mph on sustained descents.
• If this ride is representative of general conditions, the new limit would place a majority of downhill riding in technical non-compliance unless riders actively brake.