Use the bi-mode op­tion

Rail (UK) - - Open Access | Letters -

To re­duce trans­port’s en­ergy con­sump­tion, trains and buses must be­come more at­trac­tive for jour­neys through densely pop­u­lated ar­eas.

Bi-modes could dis­place all pre-pri­vati­sa­tion diesel mul­ti­ple units (Classes 150-166) by 2028, be­cause of ad­vanced age, emis­sions non-com­pli­ance, and in­ad­e­quate or absent air­con­di­tion­ing. This would fa­cil­i­tate in­cre­men­tal elec­tri­fi­ca­tion, start­ing with straight­for­ward (most favourable clear­ances) sec­tions of dif­fer­ent routes.

Stadler’s FLIRT bi-mode ( RAIL 853), which is more pow­er­ful than an HST power car, could man­age 125mph on diesel en­gines (re­mov­able by un­cou­pling ve­hi­cles).

Man­u­fac­tur­ers should use Stadler’s ap­proach of Ja­cobs bo­gies, ded­i­cated power cars, and shorter car­riage bod­ies - en­abling level board­ing and min­imised plat­form-train gaps, and thus tack­ling so­cial ex­clu­sion and in­ac­tiv­ity.

Ben Hughes, North York­shire

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