In the context of congestion pricing, what specific cost is identified as the 'externality' that conventional, free travel fails to account for?

Answer

The delay imposed on all other drivers

The externality is defined as the higher cost incurred by other road users when one additional vehicle enters a congested traffic stream, specifically the delay imposed on everyone else.

In the context of congestion pricing, what specific cost is identified as the 'externality' that conventional, free travel fails to account for?
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