Computerized embodiments are disclosed for efficiently storing site-to-site transit information in a reduced amount of computer memory. In one embodiment, a transit data structure and a compensation data structure are generated and stored in memory of a computer. The transit data structure has dimensions of first job site identifiers by second job site identifiers that allow transit data cells of the transit data structure to be addressed. Each transit data cell stores a pattern index value representing a traffic pattern and a base travel time value representing a minimum travel time between two job sites. The compensation data structure has dimensions of pattern index values by level index values that allow compensation data cells of the compensation data structure to be addressed. The level index values are derived from travel conditions and vehicle conditions. Each compensation data cell stores a single byte of data for adjusting base travel time values.