[Routing] Bringing routing functionality to a web-mapping application - but how?

[Frank Glück]

Lambertus wrote
>Frank Glück wrote:
>> Which routing alternatives do you use for your web-mapping 
>applications?  
>> How does for instance www.OpenRouteService.org solve this purpose?
>> 
>I wrap a PHP page around the Gosmore routing engine [1] to make it's 
>routing capabilities accessible through a webbrowser. The PHP page 
>behaves like an API: 
>http://wiki.openstreetmap.org/wiki/YOURS#Route_calculation_API

That sounds quite interesting, but is it just not able to calculate routes
for distances longer than 200 km? And it is only available as an API? I'm
not able and allowed to download and adapt the source code for my own
purposes? I ask that, because for my project I do not really need, just do
not really want to get very exact routes, but for statistic purposes only
estimated routes for hundrets of people going the same very main ways.