This is article in The Reporter covers multiple Main Street Improvements which have been in the works for the past several years. It appears some of them will move forward and others are on pause due to timing changes with SEPTA, at the main Lansdale Train Station.
Though it is not stated in the article, it looks like delays associated with the crossing gates and the elevation of Walnut Street will most likely delay the Liberty Bell Trail crossing improvements which will allow trail users to get across Main Street in a much more logical way at Rail Road Avenue, then cross the SEPTA lines on the side of the train station to get over to Walnut Street.
As of right now, the Liberty Bell Trail is expected to follow Walnut Street up to 9th Street, where it will cross the SEPTA lines again to head west towards Hatfield Township.