Other information, such as traffic problems and the performance of individual couriers, also needs to be taken into account.
The city's transportation agency, Transport for London, reported moderate traffic problems Wednesday morning as the rules went into effect.
Protesters predicted that the community centre would cause traffic problems, but the As-Salaam Trust said many users would walk to the facility.
"We do not anticipate any problems with traffic volumes as the impact statement suggests it will only be affected by 0.2%, " he said.
For decades, problems such as rising gasoline prices and traffic congestion on I-15 have aggravated Vegas-bound weekenders.
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There were traffic problems on the Westlink for several hours as the Broadway off-slips were closed in both directions.
The letter cited several studies that showed stimulants such as caffeine mask the intoxicating effects of alcohol and could lead to increased risk-taking and other alcohol-related problems such as violence, sexual assault, traffic accidents and even suicide.
There are also bound to be traffic problems near the boundaries of the tolled area as car drivers skirt around its edge to avoid paying the fee.
That suggests, at the very least, that congestion pricing should be applied judiciously to resolve specific acute problems, rather than as part of a broader effort to curb traffic.
Some cities, such as Cambridge, York, Edinburgh and Oxford have already made some inroads into their traffic problems by these methods.
"As more networks develop, and existing ones grow, the problems of information routing and traffic flow become increasingly more difficult to solve, " says Dr Raine.
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