Ambulance travel times (RIVM 2009)

The RIVM estimated travel times for ambulances using lights-and-sirens, between every two postal codes in the Netherlands. They update this every few years: I was allowed to use the older version from (2009).

The method they used to obtain these estimates is described in:
Kommer, G. J., & Zwakhals, S. L. N. (2011). Modellen referentiekader ambulancezorg 2008: Documentatie rijtijden-en capaciteitsmodel.