Or if you have ever been caught in a horrendous traffic jam, you know how frustrating it is to be trapped in a vehicle that is designed to move but that has been forced to a standstill.
सन्‌ १९७४ तक बॆलजियम, फ्रांस, जर्मनी, ग्रेट ब्रिटेन, इटली, नॆदरलैंडस्‌, और स्वीडन उस स्तर तक पहुँच गए थे ।