BOSTONTravelers on Interspace 92 experienced delays of up to three hours after 117 aerocars were involved in a tropospheric pileup Monday. 'We traced the problem to a malfunctioning holosign over the harbor's low-pressure zone,' said Anders Featherston, lead engineer of Boston's Big Draft project. 'Four horizontal lanes and three vertical lanes merged without warning, causing the first few propeller-benders, and it only escalated from there.' The 22 deaths caused by the accident were only temporary, as EMTs had the victims' cortical memory stacks decanted into fresh bodies within hours. 