Aggregation of traffic impact metrics is provided. Each of a plurality of holidays is associated with a holiday category of a plurality of holiday categories. The plurality of holiday categories includes a first holiday category and a second holiday category. A plurality of points of interest along a link of a transportation network is identified. At least one of the plurality of points of interest is associated with the first holiday category and at least one of the plurality of points of interest with the second holiday category. A mean category impact for each of the plurality of holiday categories is determined. An aggregated traffic impact metric is determined based, at least in part, on the mean category impact of each of the plurality of holiday categories.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method for aggregation of traffic impact metrics, the method comprising: associating, by one or more processors, each of a plurality of holidays with a holiday category of a plurality of holiday categories, wherein the plurality of holiday categories includes a first holiday category and a second holiday category; identifying, by one or more processors, a plurality of points of interest along a link of a transportation network; associating, by one or more processors, at least one of the plurality of points of interest with the first holiday category and at least one of the plurality of points of interest with the second holiday category; determining, by one or more processors, a mean category impact for each of the plurality of holiday categories; and determining, by one or more processors, an aggregated traffic impact metric based, at least in part, on the mean category impact of each of the plurality of holiday categories. 2. The method of claim 1, wherein the aggregated traffic impact metric corresponds to a date on which a holiday of the first holiday category occurs and on which a holiday of the second holiday category occurs. 3. The method of claim 2, further comprising: determining, by one or more processors, a mean weekday volume for each day of a week, wherein the mean weekday volume for each day of the week is based, at least in part, on historic traffic data for one or more previous days corresponding to the day of the week. 4. The method of claim 3, wherein the aggregated traffic impact metric is a function of: (i) the mean category impact for each of the plurality of holiday categories; (ii) a number of points of interest located along the link and associated with each of the plurality of holiday categories; and (iii) a total number of points of interest along the link. 5. The method of claim 4, wherein the mean category impact for each of the plurality of holiday categories is weighted based on a ratio of the number of points of interest along a link that are associated with the holiday category to the total number of points of interest along the link. 6. The method of claim 2, wherein the aggregated traffic impact metric is a sum of: (i) a mean weekday volume of the date; and (ii) the mean category impact for each of the plurality of holiday categories, wherein each mean category impact is weighted based, at least in part, on the mean category impact of each other holiday category. 7. The method of claim 3, wherein the mean category impact for each of the plurality of holiday categories is based on a traffic impact for each holiday of the holiday category. 8. The method of claim 7, wherein the traffic impact for each holiday is based on historical traffic data of one or more previous occurrences of the holiday and a mean weekday volume for a day of a week of each of the one or more previous occurrences. 9. A computer program product for aggregation of traffic impact metrics, the computer program product comprising: a computer readable storage medium and program instructions stored on the computer readable storage medium, the program instructions comprising: program instructions to associate each of a plurality of holidays with a holiday category of a plurality of holiday categories, wherein the plurality of holiday categories includes a first holiday category and a second holiday category; program instructions to identify a plurality of points of interest along a link of a transportation network; program instructions to associate at least one of the plurality of points of interest with the first holiday category and at least one of the plurality of points of interest with the second holiday category; program instructions to determine a mean category impact for each of the plurality of holiday categories; and program instructions to determine an aggregated traffic impact metric based, at least in part, on the mean category impact of each of the plurality of holiday categories. 10. The computer program product of claim 9, wherein the aggregated traffic impact metric corresponds to a date on which a holiday of the first holiday category occurs and on which a holiday of the second holiday category occurs. 11. The computer program product of claim 10, wherein the program instructions further comprise: program instructions to determine a mean weekday volume for each day of a week, wherein the mean weekday volume for each day of the week is based, at least in part, on historic traffic data for one or more previous days corresponding to the day of the week. 12. The computer program product of claim 11, wherein the aggregated traffic impact metric is a function of: (i) the mean category impact for each of the plurality of holiday categories; (ii) a number of points of interest located along the link and associated with each of the plurality of holiday categories; and (iii) a total number of points of interest along the link. 13. The computer program product of claim 12, wherein the mean category impact for each of the plurality of holiday categories is weighted based on a ratio of the number of points of interest along a link that are associated with the holiday category to the total number of points of interest along the link. 14. The computer program product of claim 10, wherein the aggregated traffic impact metric is a sum of: (i) a mean weekday volume of the date; and (ii) the mean category impact for each of the plurality of holiday categories, wherein each mean category impact is weighted based, at least in part, on the mean category impact of each other holiday category. 15. A computer system for aggregation of traffic impact metrics, the computer system comprising: one or more computer processors; one or more computer readable storage media; program instructions stored on the computer readable storage media for execution by at least one of the one or more processors, the program instructions comprising: program instructions to associate each of a plurality of holidays with a holiday category of a plurality of holiday categories, wherein the plurality of holiday categories includes a first holiday category and a second holiday category; program instructions to identify a plurality of points of interest along a link of a transportation network; program instructions to associate at least one of the plurality of points of interest with the first holiday category and at least one of the plurality of points of interest with the second holiday category; program instructions to determine a mean category impact for each of the plurality of holiday categories; and program instructions to determine an aggregated traffic impact metric based, at least in part, on the mean category impact of each of the plurality of holiday categories. 16. The computer system of claim 15, wherein the aggregated traffic impact metric corresponds to a date on which a holiday of the first holiday category occurs and on which a holiday of the second holiday category occurs. 17. The computer system of claim 16, wherein the program instructions further comprise: program instructions to determine a mean weekday volume for each day of a week, wherein the mean weekday volume for each day of the week is based, at least in part, on historic traffic data for one or more previous days corresponding to the day of the week. 18. The computer system of claim 17, wherein the aggregated traffic impact metric is a function of: (i) the mean category impact for each of the plurality of holiday categories; (ii) a number of points of interest located along the link and associated with each of the plurality of holiday categories; and (iii) a total number of points of interest along the link. 19. The computer system of claim 18, wherein the mean category impact for each of the plurality of holiday categories is weighted based on a ratio of the number of points of interest along a link that are associated with the holiday category to the total number of points of interest along the link. 20. The computer system of claim 16, wherein the aggregated traffic impact metric is a sum of: (i) a mean weekday volume of the date; and (ii) the mean category impact for each of the plurality of holiday categories, wherein each mean category impact is weighted based, at least in part, on the mean category impact of each other holiday category.