Is Christian Wolmar's sceptical view of self-driving vehicles vindicated by the report from the House of Commons Transport Committee [1:59]?  Does the new default 20mph speed limit on residential streets in Wales point the way to better road safety or economic ruin [9:50]?  Will political choices leave the breathtaking HS2 Old Oak Common station as the terminus of a bizarre Acton to Aston railway [15:37}?  Christian and co-presenter Mark Walker set out to answer these questions.

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