145 and 873 have their northern termini on 248 in Lehigh Gap .
145 and 873 extend downriver via Treichlers to Allentown and south via Slatington to Schnecksville , respectively .
145 and 873 have their northern termini on 248 in Lehigh Gap and extend downriver via Treichlers to Allentown and south via Slatington to Schnecksville , respectively .